A little bastard who steal anything they get their hands on. When they write they create bastard setences with their little rat hands and make them everyone elses problem. Prolly has good grades though. Theyre just really dumb.
Person A: *steals food from their friend's lunch*
Person B: You're such a fucking bastard rat. Give me back my sandwhich.
Person B: You're such a fucking bastard rat. Give me back my sandwhich.
by UrMom840 June 9, 2020
Get the Ratmug. 
Often referred to as Mullet Rat, a Rat is someone who is between 14-17 years old who has a mullet. Typically Rats have lots of girlfriends as it's their instinct to try and reproduce. Rats usually live in a shit house and have divorced parents.
person1: I'm gonna fuck u up kid
person2: Ew ur a mullet rat
person1: OK, and?
person2: You are the lowest a human being can go
person2: Ew ur a mullet rat
person1: OK, and?
person2: You are the lowest a human being can go
by Detaetiousinqq January 14, 2022
Get the Ratmug. An Escape from Tarkov player who adopts a playstyle of lurking in dark corners, waiting to get the drop on an unsuspecting player. Rats can usually be found using cheaper weapons/ammunition/armor, providing them a low-risk high-reward playstyle, often to the general hatred of more pvp-centric streamers in the community.
Ratting - the act of being a rat.
Ratted - to be killed by a rat
Ratting - the act of being a rat.
Ratted - to be killed by a rat
by Lck0ut June 6, 2021
Get the Ratmug. Rat (n): pretty much everyone who has ever said anything in the Unify discord channel, most notably someone who just says X a lot (ahem)
by Esquirenicus April 6, 2022
Get the Ratmug. by Rufus Seizure November 14, 2019
Get the Ratmug.