This a sexual trick a woman does when her boyfriend is an ass. The two are messing around when the girl starts to go down. She gets all into him and then puts it in her mouth. The guy is psyched that he thinks he's about to get head but the girl does nothing. she just stays there with his dick in her mouth and does nothing. This is also known as the "Klute"
"the dumb narkoleptic fell asleep on my dick."