Green FN is short for Green Fuck Nigga. Green being taken from NBA 2K — where green indicates a effective and difficult shot.
White Kid named Joshua: Yo Green FN!
Black Kid named Isaiah: Stupid nigga
It means "Green Fuck Nigga!" This refers to making a shot "green" or making a shot "wet" ( when the ball doesn't hit the rim as it goes in). The shooter can say Green FN as they make the shot.
Cody: "You not finna make this shot."
Daniel: "Green FN!!!"
It means "Green Fuck Nigga!" This is used when someone shoot a basketball and makes it "wet".
Jalen: "Bro you not makin' that shot.
Anthony: "Green FN!!"
*makes shot*
Jalen: "My bad big bro..."
green fn refers to “green fuck nigga”, which is a reference to the NBA 2K series. a green shot means a 100% chance of it going in, or in other words, a perfect shot. this term is used commonly by the African American population while playing sports. this meme was popularized with an image of peter griffin shooting a fadeaway middy.
*dribble dribble shoot* “Green Fuck Nigga” (green fn) *swish*