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Fluppsen 

Being an idiot. When someone says something exceptionally stupid and/or just in general acting dumb. Someone who is a "fluppsen" often acts as if he knows a lot and knows about things, but can often be proven wrong by simply questioning him/her.
Chad just asked if I got ebola from visiting Asia, he's such a fluppsen!
Fluppsen by Ioniz November 5, 2014
Related Words
Flupos Flups Fupos FLUBOS Flapos Flucose FFUPOS Flaposauraus floposaur flumpos
A rare word used to punctuate an ending of a phrase when the ending is not apparent.
James, your dad died....flups.
The clerk behind the counter was such a fupos, he couldn't even make change for a twenty dollar bill.
fupos by JannyGurl May 14, 2006
Damm... Windows XP is a FUPOS!
Fupos by maximo_41 September 27, 2005
Abbreviation for:

Fat-Lazy-Ass-Piece-Of-Shit =
F.L.A.P.O.S.
You need to wake up at 5am, so don't be a FLAPOS!
Flapos by dna_rat June 16, 2005
An acronymn that is pronounced foo-poss and used as a nickname for a freshman. This freshman is respected to the smallest degree. He usually is targeted due to his lack of skill in sports, and with girls, along with his characteristically high voice and other's suspicion that he is truely a homosexual. He is usually small and weak and easily picked on.
Upperclassman 1 : See that kid over there?
Upperclassman 2 : The little one strikin' out with those girls?
Upperclassman 1 : Yeah, you know what that makes him right?
Upperclassman 2 : Oh for sure!
Together: FFUPOS!!!!!!!!
FFUPOS by Rashee44 April 17, 2010