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1.
Noun or verb: When one believes that their expelled flatulence may have been wet.
After attempting a silent fart in class, Maddie immediately ran to the bathroom for a buttcheck
by Chickenchipper March 06, 2009
 
2.
A butt check is whenever anyone intentionally bumps into you with their butt.
Briana butt checked Tom on her way past the table, hoping for a fight.
by B!GMack January 21, 2012