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 24, 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 30, 2003
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Snicker butt is when either one doesn't wipe properly or one expresses a wet fart filling your crack with unwanted mess. Often causes itching and embarrassing jerky movements.
"Joe ran out of t.p. in the jiffy john and now he has snicker butt, look how he is walking."
by Bedrock Gang March 17, 2009
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