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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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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The inevitable consequence of a sweaty and badly wiped arse. Particularly common in Magaluf
Jay sus when i ran out of arse wipe this morning i never thought I'd be on this beach wiping bum crack gravy with the missus' t shirt
by Juicin' Mckracken-Stuff July 22, 2017
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the top of your ass crack that usually reveals itself when you bend over.
i.e. builders bum
"dude, check out the chicks micklepock bum crack ass cleavage... i'd love to give it a lick."

"god damn i've got an itchy micklepock bum crack ass cleavage."

"woah!!! mate, pull up your trousers. your micklepock bum crack ass cleavage is giving me the stink eye"
by Lukris Aaromatt January 15, 2009
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A person of unpleasant appearance (and usually odor) who does not neccesarily use crack cocaine, or any drug for that matter. Not to be confused with the home less or street crazies. A shopping cart excludes the person from being a crack bum if it is not filled with copper or other recyclable materials. Crack bums are usually spotted in populated business areas where there are few police officers. They are known for panhandling and mooching off of anyone they are acquainted with.(not the same thing as hippies, they have dreadlocks or pachuli) Having a home or at least a legal address does not exclude a person from being a crack bum.
Who is that dued bumming cigarettes and beers at the BBQ? I saw him the other day in front of 7-eleven wearing purple sweat pants and fake gators. He had a suede fedora from 1976. What a friggin crack bum.
by izdaica December 27, 2008
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