Offie is a word that is used to describe someone that is a bitch ass nigga or someone that does some fucked up shit.
Example #1
DaeDae: Yo brodie, you hit those last night?
TyTy: Yeah but I had put a bag over that bitch head cause she was dead ugly gr8.
DaeDae: Yo you a offie LMFAOOOO
Example #2
Gary: Yo bro bro you know I don't go no gas but like can I hit the blunt one time?
Brandon:*Starts an argument with Gary and goes off on why he won't let him hit the blunt ONE TIME*
Gary: Yo Dae Dae can I hit your blunt? Cause Brandon's being a fucking offie bro, I'm just asking for one hit.
DaeDae: Yeah fo sho
Gary: *Takes one hit* Alright bro, good looks!