Couch chocolate is formed when a person sits on a couch without pants on, failing to fully wipe their ass before they sit down. This results in a smelly brown patch of residue on mom's new couch, making the couch unpleasant to sit on.
"You should get a new sofa, The couch chocolate on this one makes it look like Willy Wonka's factory."
by Rasmus Hans Christianson October 23, 2011