Definitions by Aaron M.

Nap wood 

Nap wood derives from the word morning wood. It means when you take a nap and you wake up, you have a woody. It's common during class.

Dude 1: I got nap wood man
Dude 2: I hope the bell doesn't ring or you're going to be late for your next class.

Nap wood by Aaron M. April 26, 2005