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The atomic bomb that was dropped on Nagasaki in 1945.
The Fat Man and the Little Boy was one of the many stepping stones toward the Cold War era.
by Ian22 December 05, 2006
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*The codename for the atomic bomb that was dropped on Hiroshima on August 6th, 1945.

*The man of a character in MGS2; he's basically a fat-ass albino in a thick, highly-advanced EOD (Explosive Ordnance Disposal) BDU (Battle Dress Uniform), and is armed with an infinite quantity of C4's and a Glock 18. He looks and sounds like he could be a mafioso criminal or something......given his weight, he'd be more like a crimelord.
"Laugh and grow fat!"
by Dave May 24, 2004
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A human atomic bomb.

Usually in the form of a sneak jump attack.
He stole my spot on the couch!

So fatman him.
by lanners January 07, 2011
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a fat dump who incessantly eats wings until he sweats his bald ass head to a shine and drinks so damn much that he embarasses anyone who tries to compete with him. hes the best at everything there ever was: hes got the shot of kobe, feet of pele, arm of peyton manning, and swing of bonds. FTFM.
Who the hell is that bald fuck over there? Oh wait, its just the fuckin' fatman.
by Crygel Carpentears November 30, 2006
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Simple, a guy who is fat.
Stu: "Sup fatman?"
Jake: "Not much."
Stu: "Mate, lose some of that flab!"
Jake: "No it keeps me warm!"
by duckrat October 04, 2006
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large individual who despite appearance is extremely agile. Often appears sexy for some unknown reason
by mr. Q June 09, 2004
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