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
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Butt Check: exploratory fingering your anus to determine if it was penetratred.
Stoner Dude: I went to a party in Buckhead Saturday night. Knew no one there. Woke up naked in a bed and had no idea how I got there. Did a butt check to see if I was raped.
by Moblspank October 1, 2023
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