Top definition
To un-intentionally show you bum. Usually only the top part is revealed when bending down. Or if you’re a builder of some description you will already be wearing loosely fitting pants that assist in revealing your bum crack.
I was walking along the street when I saw two moons looking at me. The fattest builder was showing every one his bum crack. To which I shouted out say no to crack!
by Harpo July 20, 2004
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2
A poo hole especially designed for farts and shitting also it is a lovely shape and adds allot to the human body it a great feature you are lucky if yours is brown and hairy
Your bum crack is looking delicious today.
by queefer1 October 20, 2018
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3
An inch long crevice found on the derriere, that has escaped the modest covering from trousers.
"Cor, look at her bumcrack, the dirty slapper! You could park a car in that!"
by BumcrackTheDog November 02, 2004
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4
Completely pointless person, thing or action. Something that offers no value for its existence.
Your goatee is a bumcrack.

That bumcrack professor barely teaches us anything in class.
by Food fiends December 05, 2010
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