See Ja Rule.

An ugly rodent with oversized front teeth used to gnaw through just about anything.
I flipped the channels and came across that Rap City show on B.E.T.. At first, I wondered why the hell they were showing a dancing sewer rat on TV, but it turned out to be Ja Rule music video.
by hahaa April 26, 2004
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A plumber, especially one that specialises in unblocking toilets.
Poor old Dave, he works as a sewer rat. But hey, he gets paid good money for it!
by lyndal June 1, 2007
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A used tampon, all nasty with the string hanging out, flung in a toilet, potentially to clog the sewers.
She flushed her sewer rat despite the signs requesting not to do so.
by Joolie D October 28, 2005
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an ugly person who has bigg ass teeth and has no freinds and everyone makes fun of them.
erica is a sewer rat and no one likes them thats why they get everyone to hate them!
by joe February 10, 2005
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a t-rone or wack rapper that thinks he can who look like mr ed also with huge teeth trys to sing on his hit single in those jeans
that t-rone is such a sewer rat.
by mucus fact April 3, 2007
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1: Rat that lives in a sewer.
2: One who enjoys anal sex, especially a male homosexual.

See: marmite miner, fudge packer, uphill gardener, etc.
"Time to trap, this place is full of sewer rats"
by oracle August 20, 2004
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A rat that lives in sewers, comes out at night and rapes and pillages the neighborhood
My Uncle Jerry likes to play with sewer rats and pound lumps on Fred Flintstone's head.
by Punk Livingston December 26, 2003
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