by Steve Hanning May 19, 2007

replacement profanity word in the ringworld series, flup is what the spill mountains are made of which is the sediment at the bottoms of the seas which is pumped to the top of the mountains
by slopecarver July 30, 2010

Guy A: Dude, you're such a pussy.
Guy B: Well at least I'm not a flup.
Guy A: What's a flup?
Guy B: *Aziz Ansari voice* A flaccid penis.
Guy B: Well at least I'm not a flup.
Guy A: What's a flup?
Guy B: *Aziz Ansari voice* A flaccid penis.
by howcansheslap1 February 9, 2013

Originated in Louisville Kentucky. FLuP refers to "Far Left Pedal", or "clutch" in other words. If something is "flup", it is very clutch.. life-saving.. extraordinary.
(In a game of Flip Cup) "Slim flipped his cup before that other dude... he's fuckin' flup!"
"Chuck Norris is the most flup motherfucker on the planet."
"Thanks for taking the blame on that one... that was flup."
"Chuck Norris is the most flup motherfucker on the planet."
"Thanks for taking the blame on that one... that was flup."
by Phroxen April 18, 2006

by charlene April 17, 2004

by Bud Wiser September 26, 2003

Flup flups are a rare and heroic breed of kittens commonly found in the western regions of Europe and Wonthaggi.
They are too highly intellectual to walk so they therefore "flup flup" about on their own conditions.
They are too highly intellectual to walk so they therefore "flup flup" about on their own conditions.
by elzebub May 12, 2011
