Fat is just rude. Rats are disgusting. So Fat Rat goes fine together, but doesn't sound right. Therefore Fat Rat motherfucker just another level of Fat Fuck...just worse
Say your boss pisses you off to the point in which the word fat or fat fuck, just doesn't settle with you. Fat Rat Motherfucker is pretty insulting, personally i don't think anyone would like to be called a rat or fat rat either, so Fat Rat Motherfucker just makes it more fun to say.
by GodofGaming February 10, 2012
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A.) someone who freeloads and gets of scott-free without having to pay for everything. Derived from the expressing "fat rat in a chees factory"

B.) a person whose rolling in dough
A.) Man, we ordered the 5-5-5 deal and home boy Darious didn't put in a cent, but he still ate like a king! he be da fat rat wit da cheese

B.) Man, i'm gonna be a gangsta rappa, yo! Den i'll be da fat rat wit da cheese!
by gigi23 March 31, 2005
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the name of an album by Lil' O from Houston
i'm lil' o, da fat rat wit da cheese, a little nigga that push a big body V
by robdog073191 May 5, 2005
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this little 45 pound kid named brett we call him lb one pound of fat rat because lb little bret also meaning one pound of fat because all he is is one pound of fat and he looks like a rat
lb one pound of fat rat get over here
by bret March 14, 2004
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Some rapper from the '90s, only track I can remember is "back back"

i know this def sucks, but its the only one so live with it!
by agentsteve January 12, 2005
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A fat smelly rat dog is a small dog that’s fat, They are usually under 35 pounds and look like a rat. they also smell bad like really bad.
ewww your dog is such a fat smelly rat dog, it’s disgusting give he/r a shower! 🤮
by luna tuna September 21, 2020
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