The act of wanking prior to sleep, so as to improve the quality of your rest and also have an excuse to think of unfuckingbelievably hot chicks.
by AnimusNine April 28, 2009

by Pik0r July 15, 2007

Indulging in the act of masturbation while sleeping, usually performed by a man during a period of sexual frustration.
Tim has never had sex. One day, he woke up in his bed with a puddle by his side; he was sleepwanking.
by Elvis O'Keefe September 27, 2011
