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
1 more definition
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