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1.
When you lick your finger, roll it in coke, and stick it in your poop chute.
My bum is numb from that ass bump.
by Shunter May 13, 2006
 
2.
when your inside bumps go to the outside.
my dog, casey, was sniffing my butt and found my ass bumps!
by The Ashleys August 03, 2006