Rumpsack

to land ones ass (rump) on ones testicles (sack) in a painful manner.

Robert: Ahhhh that hurts so much
Harriet: What did you do? you only sat down...
Robert: No i Rumpsacked!!

by RobertnHarriet August 11, 2011

Rumpback Whale

The act of breaching the water with ones ass like a whale breaching for a breath of air.

I gave the life guard at the public swimming pool a rumpback whale and they banned me for the summer.

by Hardly brothers July 27, 2009

rumpsmacker5000

Is A Super Cyborg from the year 5000a.d. His primary objective is to pound snizz and smoke tweed. No smoking signs are powerless in his presence.

Awww shit bitch did you hear that mother fucker RumpSmacker5000 has traveled from the future to krush some chickens?!?!?!

by Buddhist Munky B August 11, 2010

rumpsocks

Socks for your rump.

Geez! Look at these nifty rumpsocks I bought for my bum!

by Alina Naomi May 23, 2007

Rumpackage

A word to be blurted out during awkward situations or over the phone to replace a 'hello'.

Man, i was sitting in study hall the most boring class of the day and some kid just walked in calmly and yelled "Rumpackage!"

by Rumpackage March 20, 2011

Rumpback Whale

The ass-like crack formed by a fat lady wearing a tight bathing suit in the middle of her back.

That lady has a plumber's rumpback whale.

by Hhead August 30, 2013