Address your peoples (the homies, classmates, colleagues, etc.) directly.
Usually used before a reason y the person who saidsomething first said something that made no sense.
Example 1:
Random 40-year-old man on Omegle giving himself a hand job: "Show your pussy for more dick!"
The girl on the other side: "NAHHHH FAM!"
Example 2:
Teacher who sees all the girls jumping on their desks and yelling and gossiping and says nothing to them but gets mad at the boys for cooperating on a math problem: "BOYS, WE DON'T DO THAT IN THIS CLASSROOM, GO TO THE PRINCIPLE OFFICE NOW!"
Boy 1: "Fam! Those bitches have been YELLING AND BOUNCING OFF THE WALLS and y'all gonna get mad at us? NAHHHHHH FAM!"
Boy 2: "Yea fam that's fuckin messed up bitch"