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1.
When you have to go shit so bad, you're practically dancing.
Tiffany: Ronald, stop shancing and go use the damn bathroom already.
by tiffanylovesux3 November 26, 2009
 
2.
When you have to go shit so bad, your practically dancing.
Robin: Kevin! slow down on the prune juice! You're gunna be shancing before we get back.
by Ronaldo the Dinosaur November 24, 2009
 
3.
1. a term used to describe sharting (farting but shit accidentally comes out) while dancing at the Florabama (famous bar on the Alabama/Florida border) usually caused by bushwackers or any other milk-based drink. Usually requires a "back it up" style dance in order to try to save yourself.
That guy had 3 bushwackers and is shancing all over the place.....get him out of here.
by @phatnat August 09, 2010