Nigga ass is a smell that comes from something so gross and vile. We all know a nigga who is a big sweaty smelling nigga. Therefore when you smell them itâs smells like Nigga ass.
-Oh my God after the basketball game he smelt like Nigga Ass.
-yo bro your mom smells like straight Nigga Ass
-Holy fuck the teacher smells like that Nigga Ass behind my old friends house who used to suck dick for a bucket of chicken bones.