Shast

To take a dump/poop/shit

Oh man, that KFC gave me the shasts

by Deetz McGriff May 3, 2004

shast mast

Where you sit on someone's chin and shart.

I'm going to shast mast you in your sleep.

by Hazzardouspat May 14, 2015

Shast piece

When somebody is either disappointed or amazed at something. Another way of saying shit.

The huskers lost in OT today.. Shast piece.

or

I just ate 10 hot dogs for lunch today.. Shast piece

by The Jankster 88 June 28, 2010