A technique for masterbation commonly found in middle schools, where the penis is slapped with the force of god, so hard it bruises and gets calloused, for pleasure.
one who rubs themselves in their 'special place' while sleeping. The purpetrator is usually completely unaware of his jolly good timein the morning.
rob: *rub*rub*rub* "ZzZzZzZzZz"
jack: hey everyone look, alan is sleeperbating everyone: jeez, he's getting more action than a 2 dollar whore.
jack: yep. he's a very talented sleeperbater.