someone who's good for nothing, always drunk or high, has a vape, and is usually the one who always wants to be high/ intoxicated.
by A rat May 11, 2019

A putrid, dirty home wrecking whore that slithers their way into frat houses and fucks every dude in a five mile vicinity with no protection regardless if they have girlfriends or not.
Frat Boy 1: Do you know Grace?
Frat Boy 2: Oh, that Frat Rat? She's fucked & sucked every dude in the house, even the ones with girlfriends. She even ruined her boyfriend's previous relationship just to cheat again!
Frat Boy 1: Dirty Frat Rats.
Frat Boy 2: Oh, that Frat Rat? She's fucked & sucked every dude in the house, even the ones with girlfriends. She even ruined her boyfriend's previous relationship just to cheat again!
Frat Boy 1: Dirty Frat Rats.
by DaBossAshBish February 19, 2024

Someone who Supports the FSA(Free Syrian Army) which is a terrorist organization made up of islamists, the word Rat is used as an insult, Rat meaning traitor to his country, by supporting the FSA.
Haha, look at this FSA Rat, he is so mad that his army lost the war in Syria while being supported by the west.
by Syrian963 December 17, 2021

by River Boyz July 22, 2025

by Zander2655 May 11, 2022

a rat is usually a annoying little pet but if you want to call a human a rat that means that they are quiet annoying short person
by rattyperson101 July 19, 2021

by Hephaestus June 26, 2021
