Parts that are custom made to replace broken original parts. GhettOEM parts are usually made out of just about anything to make the device work again. GhettOEM, well, its just ghetto!
"Hey Cleatus! Go git me something to make a GhettOEM part on this Chevy truck."
A fine rack on a chick - slightly better than just a 'rack.'
"Dude, look at that fucking rackus!"