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Having to take a piss.
Lindsay, im hungry, thirsty, and pisty!
by shrimpbasket September 20, 2006
To be aggravating, annoying, irritating, not doing what you want them to do.
Ethan: Hey Jacari can I copy your homework?
Jacari: HELL NO!!! I worked hard on it!!
Ethan: pleeeaseee!!
Jacari: No.
Ethan: Okay fine. Your being really pisty.
by Illuminati GURL October 16, 2011