The semi-voluntary shaking of one's legs when one has to urinate badly but doesn't yet have an appropriate opportunity. An effort to stave off the wetting of one's pants.
(pounding on bathroom door) C'mon, dad! I need the bathroom! I'm havin' a pissquake out here, I have to go so bad!
by AwfulShowKeyz August 28, 2008
When a male holds off on urinating for a long while and once he finally urinates he experiences a pleasurable bodily quiver.
I was on a road trip holding in my piss and when I finally made it to the urinal I had an awesome piss quake! My eyes teared it felt so good!
by Noturgirl March 23, 2011