Top definition
A rat that has some how found its way in to your bum gap and has made babies..
They wiggle alot and cause some discomfort

You need to get them out by there kneck as if you grab the tail it will rip off
Dave: Some things wrigglying in my ass

Keith: You may have bum rats
by tomthebomb October 30, 2007
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Dirty Sanchez Plush

It does not matter how you do it. It's a Fecal Mustache.

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2
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 18, 2008
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Cleveland Steamer Plush

The vengeful act of crapping on a lover's chest while they sleep.

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3
someone with a "right monster" stamp collection
"blankety blank" has a right monster stamp collection
by bum rat March 24, 2004
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Dirty Sanchez Plush

It does not matter how you do it. It's a Fecal Mustache.

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4
A name given to Chavs, also can be referred to as 'barry's'
by Rmb1982 August 11, 2010
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Golden Shower Plush

He's warmer than you think.

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