Top Definition
The Greatest International Scavenger Hunt the World Has Ever Seen.

Lead by actor and philanthropist Misha Collins, who is best known for his work on the show Supernatural and his organization The Random Act.
"Hey, are you doing GISHWHES this year?"
"No, but I really wanted to. I heard it's gunna be great."
by ameliasaurus rex November 14, 2011

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