a nosefull - You jam someone's nose between your butt cheeks and let out

You jam someone's nose between your butt cheeks and let out a stink bomb so strong it wakes the dead. It’s like a fart attack from the afterlife.

I woke up to my cousin’s nose in my butt crack and a fart so loud it scared the neighbor’s dog.

At the party, I gave my friend a nosefull and he started crying and ran out.

My brother passed out on the couch, and I gave him a nosefull that made him smell like a rotten sock.