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1.
Another term for having sex/intercourse.
CR: "Mmm, I'm in the mood for some good old rumpo with Barry tonight"!

Mum: "Mmm, i wouldn;t mind some rumpo with Hercules myself haha"

CR: "Ewww thats gross mum!"
by Crickle November 30, 2006
 
2.
Derived from the van in the GTA game series

Verb: to go beyond being the worst at something
Adjective: worthless
Noun: someone who sucks at everything
Well Brandon maybe if you didn't rumpo at playing this game maybe you would win.

Billy scoffed at his rumpo friends as they endlessly reminded him his sisters were hot.

Since Alex is a rumpo, he knew his life would be meaningless.
by Jehc Reed June 06, 2005