ga-dunk-a-dunk 

A big, round, bootylicious ass.

Missy Elliott - Work It
"Think you can handle this ga-dunk-a-dunk dunk"

ga-dunk-a-dunk by KeeWee January 12, 2005

ga-dunk-a-dunk 

a big fat ass

a big black ho and her ga-dunk-a-dunk ass

ga-dunk-a-dunk by joe da flava May 14, 2003

ga-dunk-a-dunk 

when guys have a bubble butt

aka a large behind that is pronounced and round.

bob: "do these pants make my butt look big?"

sherman: "yeah, bro. you've got some major ga-dunk-a-dunk going on."

ga-dunk-a-dunk by jess rose August 25, 2006

ga-dunk-a-dunk 

the male sexual organs

she hacked off his ga-dunk-a-dunk when she found out he was cheating

ga-dunk-a-dunk by XxpartyinabagxX February 2, 2005

gadunka dunk 

another werd for "a dub"

My gadunka dunk hurts ;)

gadunka dunk by Stefan Moore August 22, 2003