Fn commonly confused with fuck nigga (fn) in fact it is know among gen z as fuck nah deriving from Dallas texas it means to either disagree hard or disagree lightly whatever the context is
THE ASSES HOOD IN NEWARK NJ THEY DONT HOLD WHEEL BEEF WITH EVERYBODY SHIESTYFN IS BITCHESFUCK DJIBA 🐺🔫 DOING ALL THAT DISSING AND GOT HOS SHIT SPLAT ,FUCK TRIP MOTHER