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1. To have an overwhelming urge to take an nap immediately, without warning.

Dude 1: "Dude, after my girl and I did the nasty and she had my corn dog, I had a nap attack."
Dude 2: "Nice. After I got back from my hot dog eating competition, I busted out a nap attack myself!"
Dude 3: "Right on, bro!"
by Notorious M.A.T. July 26, 2006