An adjective that describes sonething that is crappy. Another word for jank, crap, or stupid. Comes in the form of "gwumpy", "gwumpish", "gwumping", or "gwumped".
1. Damn. The movie is sold out. Thats gwump.
2. That girl is so gwumpy all the time.
3. Bobby: "Im gonna fail this test! Im gonna fail high school and die." Tom: "Shut the hell up! And stop being so gwumpish around me!"
by Daddy Fat Fish July 20, 2010
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The sound of a female breast hitting your arm.

Verb.
The act of a breast hitting your arm.
Dude, she totally gwumped me.
by Sincomatt November 7, 2008
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When a person starts saying the word "like" so much, it starts getting more and more noticeable.
"Why do you say like so much?"

"I have The Gwump Effect."
by Mr. Yeetus August 11, 2023
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