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a coolie individual that has special needs. He is often seen in a red hoodie with a very rat-like appearance. He has an accent and walks with a limp.
LMAO look at rat boy, he be walking mad funny.
Rat Boy by yeat number1 fan April 7, 2022
Rat-boy is a neglected child who decided to live in the sewers with the rats, the only ones who would accept him. He lives today to put fear in children as he raises his army of rat soldiers and mice minions! He also creeps kids out by talking to people in the shower like that weird clown in the movie "It", freeky shit man i pissed my pants, i hate clowns. Anyway, be prepared for the uprise of ratboy! (and clowns) Lock and load your guns, get your tangelows, whatever you need for the end! -P.S. Clows really hate tangelows.
RAT-BOY is half rat and half boy.... like a boss....
RAT-BOY by dickholelarry June 16, 2010

Ratboy Genius 

The most beautifully animated and voice acted thing that has ever been on Youtube.
Nark nark, it's me, the Ratboy Genius!
Ratboy Genius by Pissmonger May 7, 2013

Ratboy's Minge 

A cavernous and oddly malodorous place that can be used to conceal stolen cars, aircraft carriers or the Indian subcontinent.
I rented Ratboy's minge out to some vietnamese illegal immigrants, and when i came back they were all dead.
Ratboy's Minge by Mitsquana February 1, 2010
A very young person that dedicates his life at playing online games. They are usually of ages between 4 and 12, with an obvious lack of life experience, and annoying voices characterized for its very high pitch.

Most important, they are always spoiled assholes and always act aggressively towards other players, specially older ones. If they feel somehow threatened they will immediately insult you. Nevertheless, if you respond in the same manner, they will run and/or cry and tell their parents (just like a rat).

The most known ratboy nests are Minecraft and League of Legends.
Player 1: Hey man, stop dying.
Ratboy (annoying voice): shaddap you cun mu'faka piece of crap shit whore!
Player 1: You are a ratboy! I will find you and I will kill you and your family for having raised such a waste of energy.
Ratboy (sobbying): Mommy! Daddy! The man was rude! *squeak* *squeak*
Ratboy by Nacsotron August 29, 2014

ratboy4353 

Some dude that's really hot and I love becuz he's fuggin amazing and like the cutest most incredible rat on this earth to exisr
Ratboy4353 is c o o l
ratboy4353 by Ratboy4354 June 16, 2022