I did an etymological search of the word, and this is what I found:
mumps
type of contagious disease, c.1600, from plural of mump "a grimace" (1590s), originally a verb, "to whine like a beggar" (1580s), from Du. mompen "to cheat, deceive," originally probably "to mumble, whine," of imitative origin. The disease probably so called in allusion to swelling of face during the disease and/or to painful difficulty swallowing.
The mind races with ways to revive the verb form of this word.
"Having been celibate for six months, he mumped shamelessly for relief!"