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!"