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1.
a term used by police officers when talking to other officers, that describes criminals that continue to re-commit crimes regardless of jail time served or programs taken.
"ya I heard he's a real shit rat"
by sparky the dog February 18, 2009
 
2.
A shit rat is a term used to describe cats. Often these are stray cats, unprotected, and cause more harm than good. This term was created by Jim Lahey on the show Trailer Park Boys, in response to all the trouble Bubble's cats had been creating.
"Hey Corry and Trevor, make sure you round up everyone of these shit rats, their ruining the park"
by EKeenan86 December 01, 2006
 
3.
1. A person, usually a teenager, who acts like a little shit. Shitrats are usually also wangsters, in that they dress and act like thugs. Most shitrats smoke pot and/or drink, and most have or will end up having criminal records. Shitrats enjoy pissing people off, and usually use homophobic or childish insults. Shitrats won't fight unless there are at least ten times as many of them. Shitrats have little regard for other people, preferring to talk down to anyone and everyone, even their shitrat friends. Shitrats usually mature into junkies. The term originated in St. Margaret's Bay, Nova Scotia.

2. A name Jim Lahey gives to Bubbles' cats on Trailer Park Boys, a popular Canadian TV show. Origin of the above term, Bubbles' cats were always getting into shit.
1. Bob: There's a group of thugs in the alley, let's not go down there.

Jim: They're just shitrats, they won't do a fucking thing.

2. Lahey: Hey! Corey and Trevor! Make sure you round up every one of these shitrats, they're ruining the park.
by Alpha-1 June 09, 2010
 
4.
shit·rat

–noun
1. A compound noun, joining the word 'shit' in its adjectival, derogatory sense and 'rat' in its slang noun sense (a person who abandons or betrays his or her party or associates).
2. Slang. Derogatory term used to describe a thoroughly disliked person.
3. Victim of unfortunate circumstances or irony perceived by the speaker of the word as a somewhat comedic situation.

-adjective
1. Slang. Closely related to its definition as a noun: it can be used to describe a person or situation. However, in it's current form it poses several grammatical contradictions to the English Language. If one is particularly concerned about grammatical fluency, they may feel inclined to use the term 'shitratworthiness'.
-noun
1. He's got himself into a shit situation because he betrayed all his friends like the rat he is: the most ideal and conventional scenario in which to use the word 'shitrat'.
2. I hate everything about that guy, he's a real shitrat.
3. So it turned out that there was nothing wrong with his exhaust but after five minutes of driving away from the garage, his exhaust fell off; what a shitrat!

-adjective
1. Your hair looks shitrat today OR there's a certain shitratworthiness about your hair that I can't deny.
by $hab April 20, 2007
 
5.
CopSpeak for young offender. Rat similar to Mallrat, and always in shit, causing shit, being a shit, etc.
This trailer park is full of shitrats, said Officer Green.
by Fat Edgar September 01, 2007
 
6.
A shit rat is a term used to describe cats. Often these are stray cats, unprotected, and cause more harm than good. This term was created by Jim Lahey on the show Trailer Park Boys, in response to all the trouble Bubble's cats had been creating.
"Corry and Trevor, make sure you round up every one of these shit rats; their ruining the park"
by Ekeenan December 08, 2006
 
7.
A miserable little dog, usually a terrier. The owner thinks that the sun shines out of their shit rat's arse. Given the opportunity, a shit rat will piss all over your house, and/or yap incessantly at nothing at all.
My girlfriend's Scotty is a shit rat. She pisses all over the floor right after going for a walk.
by Choco1ate teapot June 08, 2012