by mikeykay October 30, 2006

A beautiful creature that makes a hobby out of committing tax fraud and occasional acts of terrorism. Pretty thicc doe.
Convicted Felon 1: What are you in for?
Convicted Felon 2: Mass genocide.
Convicted Felon 1: Ayyy you're a real rat.
Convicted Felon 2: Mass genocide.
Convicted Felon 1: Ayyy you're a real rat.
by rat b thicc doe January 26, 2020

by KiStone 1000 February 5, 2003

A rat is an annoying friend or person you love in your life. But they love to piss you off..."so they a rat".
by kenny_west360 June 7, 2016

to snitch or tell the police or other members of authority about a crime that you have witnessed or that you saw your friend doing
by wordman July 6, 2005
