coucholepsy

When you almost immediately fall asleep upon sitting on a couch. Can be anyone's couch: your couch, your mom's couch or the couch of a person you just started dating.

Coworker 1: Hey, are you going out with that guy this weekend?
Coworker 2: Nope, never again. Last time he came over he passed out on my couch. Dude clearly has coucholepsy.