A rat that lives in the anus of every living being. They have extreamly large testicles which protrude from their underarms, and under developed legs, which causes them to walk on their enormous butt cheeks. A bumrat will happily eat the sharp bits in your poo and dance to dirty 70's disco music. If your bumrat dies, you die.
The french in the 100 years war fired their bumrats at the ememy, not realizing how vunerable they were when their bumrats were slain.
by Dicksmoker April 21, 2008
Get the bumratmug. by bum rat March 24, 2004
Get the bumratmug. by Rmb1982 August 11, 2010
Get the Bumratmug. by Flabby123 February 20, 2023
Get the BUMRATmug.