Can refer to either a woman or a vagina. Also quality of woman is denoted by a corresponding quality of couch. A very sexy woman would be referred to as a VenetianLove Seat, whereas a very large woman would be referred to as a sectional.
"I'm sorry dude, I was drunk last night and ended up sleeping onyour couch."
"Good luck on the couch shopping tonight at the party."
"Dude, why are you even looking, don't you have a damn fine couch back at home?"
couch is a blues/indie/punk/rock band from Tulsa, OK. On the verge of greatness, the band is at the forefront of an exciting new local music scene in Tulsa. Proof: www.myspace.com/couchsongs