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A gumpy mother fucker that awkwardly hangs around when its obvious that no one likes him. Very tall, very skinny, very gumpy. His feet usually point inward. Likes to wear converse and flannel shirts. Tends to believe that the smoking of pot will increase his intelligence. Has dreams of someday reaching an IQ level of double digits.
"God, im so sick of this gumpass"
"That guy is such a gumpass, look at him walk"
Gumpass by penguinpro October 24, 2011
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grumpass 

someone who is always negative and never
is happy
Why are you being such a grumpass?
grumpass by tigger August 10, 2003
Related Words

Gump Ass stupid 

A kid who is literally dumb as fuck, has no common sense once so ever, and a hot temper. The type of person to bitch on and on and on. When they dont get what they want they will raise their fist at you and grunt in a way to attempt to intimadate you. indulging on weed and slutty fat girls is what they usually enjoy doing, but if they dont have either they will throw a hissy fit like no other.
Hes got court in a week and hes been doing nothing but smoking pot and watching porn, That kid is fucking Gump Ass Stupid.

gumpasaurus rex 

the words gump and tyrannosaurus rex put together. to be gumpy means to look stupid or really goofy or lame. a tyrannosaurus rex is the gumpiest dinosaur ever. so when you call someone a gumpasaurus rex you are saying that they are far beyond being gumpy.
mike: look at josh over there, hes such a weirdo.
sam: wow he looks really goofy, call him over here.
mike: hey you, gumpasaurus rex, come over here!
Don't run into the door, you gumbass.
gumbass by Ethan Resnick June 29, 2008
someone who chews their gum like a dumbass
Patrick:"Wow look at stephen, he chews his come like an idiot.. like a cow grazing"
Connor:"Yea, he's a gumass"
Gumass by playitagain009 August 27, 2009
massive gas and shits caused by eating too much sugar free gum
"I just ate five packs of sugar free gum but now I'm paying for it because I have gumass."
gumass by walterdunning August 11, 2008