Verb (past tense) meaning to get an infection caused by the mumps virus, characterised by extreme swelling of the face. Many people living in close contact such as frat boys commonly get mumped. People who get mumped can show no signs for upto 6 days after catching the virus, and are infective and able to mump others for upto 2 weeks. It is also rumoured to spread rapidly through the act of swallowing each other's semen; this may or may not be linked to why frat boys get mumped a lot.
Jared : "Dude, you've been off work for days! What happened?"
Chuck : "I got mumped badly"
Vincent : "Haha look at that guy's face! He got mumped!"