verb. two people go dig up a freshly buried male corpse, someone , one of the two people, put the corpse's balls/dick in his/her mouth while the other person jumps on the corpse's stomach while you ingest whatever comes out.
My friend and I went mumping and it was fun.
by the chink March 09, 2004
adj. a synonym for "sick". meaning something is really cool or exciting.

Originated at Brown University in Fall 2008.
Person 1: Yo you heard the new Girl Talk CD?
Person 2: Yeah that shit is MUMPS!
by Spliquid September 22, 2008

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