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The act of injecting alcoholic liquid into one's own anus or another's for the purpose of intoxication.
"Dude, sorry I didn't call you back, I was rumping pretty hard last night."

"Pass the baster!"
Rumping by dan wants credit for this December 28, 2009
Related Words
Rumping is similar to Krumping except you use your ghetto booty.
Michael: wow, whats that brand new dance?

Jessii: Its called rumping its the shit!!
Rumping by jessii <3 February 12, 2010
To take a picture of a person staring and pointing at a girl's ass, and biting their lower lip. Similar to DAT ASS.
Did you see the picture of Tim rumping that girl?
rumping by The Danzanator January 9, 2012
Ramming Humping, doggy style. A strong and powerful fucking from behind!
He gripped her hips and thrust so deep, rumping her so powerfully!
Rumping by DaddyKnight September 14, 2018
I had that Mary J rumping in the ride!
Rumping by SW. October 6, 2018