In the world of Islamic fashion blogging, a new word has come into existance: "Hijabify". We all use it, perhaps to the confusion and annoyance of some, and the applause and adoration of others. It means different things to different bloggers. Surprisingly, it is not on wikipedia yet, so I thought I'd help ya'll all out.Hi.jab.i.fy. (hee-jab-i-fy)
most commonly used as a verb
ex. To hijabify this look you will need ...
1. To make high fashion and street wear into Islamic clothing by adapting it to cover the body parts required to be covered in the authentic sunnah (everything but the hands and face * see requirements of a Muslim Woman's Dress) in the manner required in the authentic sunnah (loose, not see-through, or for show and pride, and an overgarment *see requirements of a Muslim Woman's Dress), or taking inspiration from a non-Islamic source through colours and accessories but not straying from any of the requirements of a Muslim Woman's Dress.
2.) Slap a headscarf onto anything so long as there is no skin or very little skin showing.
3.) To make high fashion and street wear into Islamic clothing by adapting it to cover everything but the face and hands in a manner that is loose and not see-through, or taking inspiration from a non-Islamic source through colours and accessories but not straying from any of the requirements of a Muslim Woman's Dress.
My def. is the first one, because I read the command in the Qu'ran and the ahadiths. I respect the third one though I disagree with it on the grounds of modifying the Qu'ran to the extent of rejecting it, because at least it is thoughtfully-based on Islamic ideas and principles. Unfortunately, the second definition is FAR TOO COMMON in the hijab world. Say you take for inspiration the non-hijab picture below. You take the exact same dress and belt. You layer a skin-tight carina turtle-neck under it and skinny jeans under it. And you call it hijabifying it, even though, in Islam, this outfit you have created (first set, top of the page) BARES NONE OF the characteristics of Islamic hijab since it conceals nothing but the skin. It actually does not hide the body parts. Clothed but naked. As labelled in the hijabified-but-not-anything-to-do-with-hijab-but-scarf hijab set, a. the cut of the top/dress emphasises the bust line and cleavage width, b. the belt ephasizes the waist and thus the hips and butt and bust-line, c. the only-thing overgarment about it is from the ribcage to the thigh, and d. as much as I hate it to say it because I think all covering is good, the outfit would be more modest without the headscarf and the tight jeans. You'd just look like a cute, pretty girl, rather than sexy Muslimah. Sexy in the sexual tense cannot be comprised with "hijab" in any Islamic sense. If you have no clothes but such dresses and skinny jeans and can't afford new clothes inshaAllah PLEASE contact fellow sisters (feel free even to leave a comment here on this blog) and I will do my best to get you some more modest attire, and Allah subhanhu wa ta'ala accepts you intentions. If you're not in the third world though, and you've been Muslim for over two years (past puberty), this form of bad hijab isn't excusable anymore.
So what if you loosen up? If you have a hard time finding loose skirts and dresses in suitable non-clingy fabrics or jilbabs, this look is quite acceptable and pretty modest (I personally don't think it is dressing according to the sunnah but I do think it is modest). Wide-leg trouser pants, full-sleeved top, long top over top and loose top over the bust (girls often use shrugs). Um, a. just loose the belt and make sure your hijab covers your chest, and b. know the jilbab [an overgarment] is of the sunnah and is a command in the Qu'ran for the believing women.
I really think this here on below, the third set, is the best example of "hijabifying" since it is using clothing that is, on its own as peices, unislamic in what and how it covers, but combined, it actually forms a modest overgarment. As you can see, the belt has been lost and the pink of the inspiration peice has been replaced in the skirt and with the clutch. A long light sweater shrug flows loosely away from the body, drawing attention away from the curves of a woman's body, and the hijab aka khimar (the proper word for the headscarf is khimar and not hijab) is pulled over the chest as the Qu'ran commands the believing women to do.
Now, "hijabifying" can also be done to traditionally Islamic clothing (ha ha ha, I love this cuz I find it easier and I end up spending less money and being more comfortable in my clothes but to each their own) by taking a jilbab or long khimar, ect, and using a non-Islamic inspiration source, use some of the colours and accessories from the look to make a "halal-take" on the style. For example, instead of using a belt, I would take the colour of the belt and use a clutch. Instead of the earrings, a ring. This post took a long time to do, so I am tired and off to bed:D 
Satin bisht abaya from http://www.sunnahstyle.com/product_info.php?pName=silk-elegance-bisht-abaya&cName=abayas-other-styles for $56.99 USD.
The shoulder abayaat fell out of the scene a little ways when the shoulder/robe abaya came on the scene in the late 80s. Heading towards the nineties there was harsh debate whether it was appropriate for young Saudi ladies, lol, especially when the skin tight french cut became popular. When skin tight became a trend, the abaya stopped being proper jilbab. With 9/11 a renewed interest in preserving the name of Islam helped many sisters research their hijabs to better explain it to prejudiced persons and more modest loose fitting robe abayaat began to return, as well as more Western takes on the Qu'ranic classic, such as open styles (only hijab when also paired with a modest long dress underneath that is itself an overgarment not the undergarment).
Before the open abaya ever hit the scene though, places like Turkey and Syria were manufacturing what are termed "jilbabs"----long modest loose-fitting floor length coats that opened, buttoned and zipped. In the West, sisters found it very hard to find long sleeved floor length dresses that were loose fitting, so many started wearing a long coat with a long loose skirt, and long loose tunic tops with long loose skirts, making the traditional hijab that conisted of one or two pieces, be composed with as many as four. 
Many sisters who could not find suitable tops lengthened their scarf "hijabs" into what is now termed "khimars"---waist or knee length, and paired them with long skirts that were an overgarment (not the outfit itself but what is worn on top of). Some call these garments more polished "prayer outfits". They are what is closest to what the women of Ansaar were wearing before the ayah revealing khimar was revealed, closer even than an overhead milhafaah abaya:D. Other sisters composed their jilbabs out of one peice of cloth, wrapping it around their bodies, some women with Iranian chadors, other bright traditional African patterns, and come with saris. 
Anyways, I have seen sisters recently wearing maxi dresses and jumpers with their khimars covering their chests and most of their arms with a modest loose fitting t-shirt underneath, and I do think that this is jilbab so long as the maxi is an overgarment and khimar is covering most of the arms. Also, layering tunic (over top of a tee or a tank) and a skirt (over some kind of bottom) so long as the fabric is not clingy or see through, also constitutes jilbab, and maxi worn as an overgarment with a box coat (not a spandex shrug or carina top) is also Westernized jilbab. The key is, the garment has to remain an overgarment. Even a loose robe abaya worn with nothing underneath of it but bra and panties will leave the indent of your belly button exposed if the wind hits you right. 
Since finding garments manufactured specifically for the purpose of jilbab was expensive and difficult, many turned to ethnic clothing that was loose and non-see-through enough to do the trick, and wore traditional African and Arab inner clothing as the outer layer. Modestly decorated takchita (some ARE worn to display social status), jalibiyia (some are worn too elaborately decorated to count as jilbab to beeeeeeeee careful), djellaba, long dresses, and caftans, all work as an outer layer provided they are worn as such with the same rules about what a jilbab must be in mind. They often make the most beautiful special occasions dressings.