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2.
Somnophilia. A fetish in which a person fantasizes about having sex with somebody who is unconscious at the time.

This is different from necrophilia in that the object is still alive at the time of intercourse.
"Don't pass out in front of him."
"Why not?"
"Really into sleepysex, that one."
by the letter d October 26, 2007
 
1.
to have sex with someone while they're still asleep or drowsy.
In the early morning I will suprise my boyfriend with sleeping sex. I slide on his erection just before he wakes up.
by Roxie November 13, 2003
 
3.
what you give your woman using your morning glory
I woke at 4 am with a massive piss hard-on and slipped it into Nanci;she doesn't mind sleepy sex provided that you don't wake her up too much.
by Jake March 05, 2004