A ratboi is a type of player in Rainbow Six: Siege who will purposely choose recruit and use the M870 as their primary weapon. Ratboi can be used as a noun, and as an adjective.
I’m going ratboi this round guys.

Get ratboid you bitch-ass nigga.

FFFUUUUUUUCKK A FUCKING NAKED RATBOI, WEARING A SANTA HAT KILLED ME WITH A CANDY CANE AHHHH!!!!!
by Soap O’Dope June 7, 2018
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RatBoy is normally of male origin but this is quite often in dispute within the field of parahuman studies.

A hybrid of the black rat (Rattus rattus) and some semblance of a human being, RatBoy gains his name through his ability to scurry up any old drain pipe with vigour, voluntariness and without remorse. RatBoy is a rare bread but yet distinctive if sighted in its natural habitat - namely dark corners of bars, clubs and supermarkets. A small beady, yet twinkle eyed creature that can sniff out its prey from vast distances. A smooth talker and schmoozer who's had the cognitive or emotional experience of guilt bred out of them.
'Prey': "I met a really nice boy the other night - he stayed, fucked me senseless - despite his tiny penis it was awesome - but he hasn't called. I feel so used!

Friend: "What a RatBoy!!"
by Spandex Man March 31, 2011
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Common phrased used in the advertising industry to decscribe a creative director that scurries around sniffing into what people are working on and making cheeky comments towards the work before scamppering off.
David: How's that font looking Tyrell?
Tyrell: Not bad man, it looks a bit thin but.
Matt ('Ratboy'):Thin like the ice your ass is on, why don't you make it a bit thicker like David's head.
by Jamen P. May 4, 2006
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someone who looks like a rat with squinty pink eyes shortly after smoking some doobage. often named bill or william. generally fond of watermelon sized breasts and the bass guitar.
the bass player in the band was named bill and he had smoked a bunch of weed while jammin. someone turned up the lights and he looked just like a giant fucking rat, except that he stood upright and was holding a bass guitar and a cold bass ale.
by echoman February 28, 2004
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The most beautifully animated and voice acted thing that has ever been on Youtube.
Nark nark, it's me, the Ratboy Genius!
by Pissmonger May 7, 2013
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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.
by Mitsquana February 1, 2010
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The day we left eachother..
I wasn't Worth it for them I hope rats happy with someone new

I'm so stupid

My last words where okay
I should have said more
Knowing he'll never see this
I hope your happier with someone else I'm sorry I wasn't good enough for you
Definition of RATBOY 4353
Goodbye rat
by Ratboy4354 October 1, 2022
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