rat
A member of a secret society called the RecRats on the campus of Cottey College in Nevada, Missouri. The organization was banned (after almost 50 years) in 1994. The Rats are commonly associated with severe hazing and verbal abuse. The group resurfaced in 2002 and most likely still exists.
"The administration thinks Julie might be a Rat."
by Dot January 04, 2005
Rat
Someone that is incredibly lucky at everything. Mainly on the golf course and football betting.
"He put on a 15 fold on teams never heard of and wins a grand"

"What a rat"

"That ball hit the hole at 100mph, jumped 5ft in the air and went in"

"OMG he's such a rat!"

lucky
by TheZmonster November 29, 2013
means ridiculous arrogant tool. generally someone who wears a polo shirt and sunglasses with a neck strap. they also tend to say 'yo' and 'sup' alot. they might also play soccer, but this isn't always the case.
chubbs: yo! sup guys?

me talking to friend: oh god, here comes that r.a.t.
by crabsack February 10, 2012
Term used to express dissapointment-retro style! Substitute for a more vulgar word in the presence of children and authority figures.
"I didn't get that new job. Rats!"
"Rats! We are out of wine".
by urban ruby October 29, 2007
rat
Chevy big block engine;
396 - 502 cubic inch engine;
the most universal drag race motor,
Designed better than any Ford or Japanesse engine
that rat powered Chevy Nova just spanked my 5.0 Ford
by chevy hotrodder February 25, 2003
rat
A person who exposes another person's wrongdoings for reasons other than moral outrage or to seek justice. Usually for personal gain, to avoid trouble themselves, or out of jealousy.

The word is sometimes misused by highly immoral people to describe all people who provide incriminating evidence against other people, simply because they dislike the idea of being exposed, and want to associate a negative word with people who expose immorality.
Grant exposed the other members of his gang so the cops would reduce his sentence. He's a rat.
by link1834 April 11, 2012
Rat
A contractor that does not pay its workers standard wages or provide them with standard family health care and retirement benefits.
ABC Construction, the electrical contractor on the Lexington Avenue construction project, is a RAT.
by IBW Shop Steward April 06, 2010

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