A breed of vermin which is half rat half boy. They are extremly rare in the u.k, but can be spotted in Tregaron in Wales scurrying around for nutts. The welsh translation for rat boy is DAFYDD.
"Have you seen dafydd" "you mean rat boy!"
von Shrew Kid 6. November 2007
Top Definition
1.Person, usually male characterised with ugly features, usually sqinty eyes, buck-teeth and large appendages. Mostly avoids light, coming only out of his swamp at night to feed on scraps and discarded food. Favours dark rooms and corners, frequently listens to depressing goth music or metal. Rarely seen during daylight or showering. Generally unclean. 2.Dirty person. 3.Insult, usually directed to males or masculine females.
1.My sisters boyfriend is a goth, I dont know why she hangs around with that ratboy. 2.Have a shower ratboy! 3.Fuck off ratboy!
von John Barry 20. November 2004
UK slang.

A young teenage criminal. Lives in the airconditioning ducts of highrise blocks and shits on the carpets of the people he burgles
My TV's gone and there's shit on my carpet, I've had a rat boy in here.
von black flag 2. Juni 2004
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*
von Nacsotron 29. August 2014
an ugly person that no one like but is alway there. has little friends.
That Chris Hawk is a Ratboy
von F3arday 24. April 2009
10 year old kids who frequently play m rated games(call of duty, GTA V), or minecraft, and they have an obnoxious behaviour(they diss almost everybody who are playing with them) because of their squeaky voice. (this comes from spanish speaking countries)
"i fucking hate campers" " WTF" "just a rat boy"
von BrickDud 28. Dezember 2014
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....
von dickholelarry 14. Juni 2010

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