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1.
adj. (Informal) -ier, -iest.

Being vicious and paranoid in nature.
Did you see that newbie try to fit in that moopy music forum? Agnetha tore him apart before he could finish his second post!
by anni-frid April 10, 2007
 
2.
Term of endearment for loved one, taken from "Soup Nazi" Seinfeld episode. Aka Schmoopy, shmoopie, etc.
"You're Shmoopie! You are!" (Moopies being a derivative of the original)
by spokedb November 24, 2009
 
3.
The state of being wasted. Can also describe one who is under the influence of god knows what. Typically involves being drunk or high. The more fucked up you are, the moopier you become.
Fuck studying, it's almost 2pm, let's get some bottles and some pot and get moopy together.

Look at that kid trippin; balls over there, he is totally in moopy mode
by Moop'd July 13, 2008
 
4.
little bitty bummer bugs that crawl thro u and make u depressed and bummed
ummmmmm lala woot woot yay oli i rock?! whoohoo
by olirox January 29, 2005
 
5.
Not working properly. Niggardly. Lazy, The act of being moopy.
What's up with this moopy ass joint? I can't even get a hit off of it.
by Systolic November 27, 2006
 
6.
Something is too big and it's floppy, and it's annoying
My pants are being all moopy
by kathrynBC September 10, 2008
 
7.
adj - (MOO-pee) : Possessing the negative quality of moopiness. Coined by the blonde chick from the popular sitcom "Pals".
"Yeah, it is kinda moopy."

"Seven was a moopy year."
by lordshamus December 27, 2005