The view you get when people bend over and the top of their butt crack can be seen.
Look at her bending over, you can totally see her Bum Cleavage
by Cum and Get It August 04, 2010
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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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