(noun) a lazy, inactive roommate who never leaves the couch. his lack of mobility is legendary, leading visitors to believe that the lower half of his or her body is actually made of sofa.
you know, like your college best friend's slacker roommate that never left the "good" end of the couch.
Whoa, was that guy on the bike your roommate?
Dude, I didn't even know the Roommaid had legs.