Top Definition
When something really bad happens. Comes from suck and in this case it is sucking something big and fat. Used in the worst of situations when not much else can be said.
Doctor: I'm sorry, but you only have a few more months to live.
Man: Damn. That sucks a fat one.
by Anonymous April 10, 2004
Used as an insult.

Equivalent to telling someone to fuck off.
Damn you're a douche bag. Go suck a fat one.
by Truuuuu June 21, 2014
An insult telling the someone one to suck a d*ick
Person 1: Go suck a fat one!
Person 2: How fat?
Person 1: As fat as your mother
Person 2: Reported
by MeikSemith January 28, 2016
Telling someone to seriously fuck off. Don't just go suck a dick, but suck a fat dick. Especially if it's a weak or lame thing that the guy did.
-- Hey man, I took some money off your dresser. Then a bunch of dudes at the bar talked me into buying rounds. I'll pay you back though, as soon as I get my next paycheck.

-- Dude, go suck a fat one!
by Mondo 9000 July 23, 2016
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