A blowjob
"Shit, I'll do that for free"
means
"Shit, I'll do that for a blowjob"
Free is used as an "Urban Alternative" for R.I.P. The word free is mostly used when communicating digitally.
Friend 1: When I was making cereal this morning, I spilled the milk all over myself.
Friend 2: Free
Slang term common amongst experimental “trap metal” artist meaning “federal agent”.
“So are you selling me this marijuana or not?”
“ah hell nah you on some free asian shit. get the fuck out my whip”