Sewer Rat 

One who charts and explores sewer systems (purely for recreation)

Ben was underground for about 4 hours, he's a real sewer rat.

The local sewer rats are having a bi-weekly expedition under the city

Sewer Rat by soo wer rat October 29, 2003

crack rat 

someone who takes crack and stinks alot

you drugged up crack rat!!

crack rat by mattybeans February 13, 2005

Irv-rat 

Resident of Irvington area of Indianapolis. Also pertains to the culture of the area, specifically youth culture. Term became internationally popular in the mid-1990s.

"Wait, Steve's having a party?"
"Yeah, why?"
"Oh man, that's an Irv-rat party, we'll have to go!"

Irv-rat by Matt Davis February 9, 2006

hood rat 

A girl who is a skan hussy and walks around dha hood actin lyk she 5 star bitch but she nun but a 2 star and she pregnant by chris !

Shanquea:"ew yu see daht girl ova dher she a straight hood rat she done capped of dha hood tht two timen hussey "

hood rat by SHANDA & CHRiS October 21, 2010

crow rat 

Someone who is to stay in crowfoot everyday of the week, chilling either at dons or fucking around.

Nathan is a crow rat

crow rat by ethan fukd ur aunt July 6, 2017

Bed Rat 

One who sleeps wherever they can.

Because he's a fuckin bed rat!

Bed Rat by rudeboy64 August 5, 2010

Crack Rat 

Someone who is behaving like a crackhead and a rat.
a) gross
b) unmannered
c) acting extra
d) annoying

1) “Why does she think it’s okay to be this annoying at 8:30am?”
“She’s behaving like a crack rat.”
2) Some people are such crack rats when they act out in public.

Crack Rat by cracktivity December 1, 2019