The externalization of an internal feeling of great glee or joy.
After defeating Jimbob, Jose exclaimed "Whumpus!" at the top of his lungs and then proceeded to "bo" the table.
by C Nichols February 26, 2008
1 more definition
A slightly overweight individual who is slow, and unwieldy in movement due to their weight. A whumpus lacks agility, and almost always looks funny when trying to move quickly.
Man, Mac is such a whumpus. He sure looks ridiculous when he runs.
by Franz Vorenkamp April 03, 2008