What is I Ain't Fuck Ya?
To be completely honest with someone. A promise not to play head games or beat about the bush. Beautiful.
"I ain't fuck ya. That diamond necklace is really worth $2 million. I'll sell it to you for $20."
I ain’t fuck ya: To indicate innocence or reassurance of no wrong doing in a personal or business relationship.
aka: I haven't screwed you, I haven't fucked you.
Movie: Snatch Brad Pitt's character, Micky, a Traveler who sells Tommy and Gorgeous George a shoddy caravan (camping trailer) whose wheels fall off as they are towing it away; Mickey's says, "You want your money; I ain't fuck ya, I'll fight ya for it."