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1.
Interjection connoting anal success
"Jenny and I went home with a tube of Astroglide and Rumph Rumph Rumph!!
by Big Daddy Drew September 20, 2006
 
2.
A situation in which your plans flop; dont go as planned
Girl: Yo we be missioning tonight?
Boy: Naw, i got arrested, i have curfew
Girl: Shit, this is a rumph
by madmeat August 10, 2008
 
3.
a racist word for an black asian jewish person
rodney was the biggest rumph in the whole world
by kankels September 22, 2009
 
4.
To consume a large portion of food or meal...

Do you want to go rumph?
How was the rumph last night (in this case it would be a meal)
by Nick Dove December 11, 2007
 
5.
Worthless, wastrel, under achiever
Do not employ this person, he is a Rumphy son of a bitch!
by The Elder November 23, 2004
 
6.
Inactivity, lethargy or laziness
Verb:
"Are you doing anything today?"
"No, I'm just Rumphing/having a bit of a Rumph"

Adjective:
"The cold and the rain made it a slow and Rumphy day"
by Molehill November 03, 2004