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from "Seinfeld", the "Moops" were the nation that conquered Spain & gave it the twinge of Islamic architecture seen to this day, according to the card George was reading from when playing Trivial Pursuit against the "Bubble Boy". Bubble Boy insisted, quite rightly, of course, that the answer was "Moors", but George being the prick that he was, wouldn't give him credit for the answer. The townspeople later drove out the fiendish George & Jerry for their mistreatment of the Bubble Boy.
Bubble Boy: It was the Moors! The MOORS!

George: No, I'm sorry, it was the Moops. The card clearly says, "Moops".
by FunkyBumpkin May 02, 2005
a shortened version of the phrase "Massive Poop"
Herbie sat on the toilet and transcended taking a poop, it was much more massive; he took a moop
by mofotronimus October 10, 2006
Acronym for Matter Out Of Place
mr. Belvedere was moop at the anime convention
by Helne April 08, 2005
A neutral version of meep. Can be also used randomly..
1st person (who is excited): Meep!
2nd person (who is not excited): Moop.


by ladyjulianne November 30, 2003
A person that has sex with dead people.
eww.. she's a moop.
by Roman Anders June 06, 2011
To burp while keeping you mouth closed, then tapping your sister on the shoulder and blowing it in her face.
She wouldn't change the channel, so I burped up some pizza and mooped her.
by W.E. Coyote August 20, 2003
being extremely random and sexual almost homosexual during hyperactivity, with the exception of grabing ones breasts or penis
(or out of control)
"I was so moop today i walked up to a stranger and yanked on his crotch"

"that was my dad"
by ehna September 09, 2008
An unreliable person. Someone who shows up late, doesn't pay rent or repay loans, can't hold down a job for very long, etc. Your typical moop has tattoos, piercings, court-ordered child support, a substance abuse problem and a petty criminal record. One step up from a rubadub.
I thought tending bar would be a fun job, but I couldn't stand listening to the moops tell their stupid fishing stories all day!
by paperbackwriter July 10, 2008