| 2. | Bum Grease | ||
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The product of swamp ass that collects at the top of your butt crack. My terrible case of swamp ass left a bum grease stain on my underwear.
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| 1. | bum grease | ||
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The disgusting film of dirt or grease that bums leave behind after sleeping on train seats Don't sit there, that dirty hobo left behind some bum grease!
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