Nocturnal Penile Tumescence, or the uncomfortable feeling of waking up with an erection. The slang was adapted from Morning Sickness.
Hey dude, you got a mad morning thickness there. Cover yourself.
by Zandermuel December 03, 2007
Type your email address below to get our free Urban Word of the Day every morning!
Emails are sent from firstname.lastname@example.org. We'll never spam you.×