Definitions by CertifiedRacismman

STFUNBIH 

Stands for Shut The Fuck Up Nigga Burn In Hell

Person 1: Bro just dropped a new diss track on you it will be more fire then your mom's cremated ass.
Person 2: Bruh STFUNBIH

STFUNBIH by CertifiedRacismman June 15, 2021