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Pronounced "What for, why do?"

1. A statement of incredulity.
2. A term used to question one's motives behind an action.
"You're going to staple a sign to your skin? Wat4Ydo?"

"You want to win an international hot-dog eating championship? Wat4Ydo? That's not the way to prove your worth!"
by Zigfried July 15, 2008
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