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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
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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"
Rat Boy by BrickDud December 28, 2014
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.
rat boy by black flag June 2, 2004
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!"
Rat Boy by Shrew Kid November 29, 2007
A young biped homosapien with a rather rat shaped skull and rat fingers and other rat like limbs.

Body phyisique of a rather wide upside-down wineglass full of ejaculatory fluids.

Body odour is similar to that of a misture of diseased rattus norvegicus carcass & 30 dead skunk baby's, bathing in a 40 gallon titanium container of liquified ammonia with a hint of sulphurique acide and nuclear waste.
Rat Boy: Hey girls's wanna come chill at my crib?

girl 1: Where do you live at?

Rat Boy: In a mansion made of dried up, used toilet paper and i use contaminated hospital syringes for nails to hold 'er all together!

girl 2: *gag* wow, your one dirty little boy *winkwink*

girl 3: what do you sleep on?

Rat Boy: A very comfortable matress made by me and my friends, made of used condoms and baby diapers. All held together by my very own ejaculation glue.

girl 1: EWWWWWWW ! Your one of those *gag* RAT BOYS!!!!!! *gag* *vomit*

girl 2: *glass shattering shriek* *upchuck*
girl 3: *vomit on girl 1* *takes out pepper spray and sprays girl 2 by accident*


Rat Boy: Mmmmmmm this is gettin kinky. *chews their hair and runs away*
rat boy by Rat Man Sensei April 16, 2009
A slim young male with blonde hair in a spikey style.
Rat boy by scrunions r us December 26, 2007
Rat Boys are basically roadmen that are in your school. These boys are the ones who shout random words in the halls while bounce-walking. If you go to secondary school in the UK, these are the boys that are in 5th and 6th year, "Weasel Boys" are in 3rd and 4th year and "Mouse Boys" are the ones in 1st and 2nd year. The only thing you need to look out for when trying to find a Rat Boy, just look for the roadmen in the school.
Example
Rat Boy 1: "EL CHAPO!!!"
Rat Boy 2: "OHHHHH, YOU WANT TO GO OUT FOR A CIGGY?"
Rat Boy 1: "YEAH BRUV, BUT FIRST WE GOTTA GET SOME UNDERAGE SKETS!"
Rat Boy 2: "FRICK YES MATE! LETS GOOOOOOOOO!!!!"
Rat Boy by 6ix9ine minecraft version February 21, 2019
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