I. the result of a sexual act which happens when a woman is licking a guys genitals, and he defecates in her mouth and kicks her in the chest at the same time, forcing her to inhale.

II. a stupid person.
"d00d, me and that girl had sex last night, i gave her a f**kin dumplung, man!"

"that guy is such a dumplung."
by jeremy January 15, 2004
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