Top Definition
When you think you are done with on the toilet, but you stand up and realize you have not finished peeing. Pee then gets all over your underwear...a pee-tastrophy!
Fredy: Are you done yet?
Sarah: Yes, just pulling up my pants. Wait, oh crap, I just had a pee-tastrophy! I peed in my pants!! Now I need to change clothes!
by ndrew52 October 12, 2011

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