A really really wet poop
Person 1: ew who just blew up the bathroom, its stinks
Person 2: Sorry i just did a Bum Gravy
by jcattywatty December 18, 2010
more commonly known as diorhea, is basicly a liquid shit that stinks out the toilet for about a week
oh mann ive done a bum gravy i need air freshener quickly!!
by DJ SPYKERZ(SCOUSED OUT) July 31, 2009
liquid produced by mixing anal mucus with sperm
i enjoyed lickin off Jamie's bum gravy before my second entry
by Attilla the Hump June 11, 2003

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