The act of having sex while one of the partners is sleeping. If the partner who is not awake orgasms they will believe it is just a wet dream.
Mary was not happy when she orgasmed believing it was a wet dream when it was really a sleepfuck with John. She is now expecting a child.
by Fletcher Boys January 13, 2007
Falling asleep while fucking. Sleepfucking somebody can be a hazardous practice since you can get gonorrhea or syphilis by the time you regain consciousness.
by Solid Mantis June 11, 2018
Can be more interesting than sleepwalking.
DJ Cutoff Sideburns could fuck in his sleep, he was sleepfucking man. He wasn't good at what he did, but he could do it and that's something.
by Solid Mantis June 11, 2018