Top Definition
Sweet anal sex of sexiness.

(can also be used as a verb, meaning "to buttfuck")
Example 1:
Bro 1: "Hey man, did you chumna Michelle last night? She's been walking funny all day!"

Bro 2: "Yeah bro, I chumna'd her sooo hard. She wont ever walk in a straight line again!"

Bro 1: "BROFIST!"

Example 2:

Bro: "Have you ever had chumna before, babe?"

Babe: "No, but I heard it smells awful."
by Master Jizzmyself July 02, 2011
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