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When you are retaining gas, start laughing too hard and you fart with each laugh.

When someone comes up unexpected and jabs you in the ribs and you let one rip. You experienced a butt snicker
by thezeppelin February 23, 2005
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Human feces, a dookie, doodie, shit, poop, crap. Especially when a log-shape.
Either someone left some candy on that chair, or they lost control of their bowels and left a butt snicker for us.
by Tim September 29, 2003
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