when a couch potatoes ass has grown so big that it has started to conform to the shape of the couch.
#1 OMG....look at that ass!!!! It is HUGE!!
#2 Yeah, look at that couch butt.
#1 looks like the cushions just suctioned themselves to her backside.
9👍 4👎
This type of Butt is so enormous that when it sits down the butt takes on the characteristics of a couch. When one is looking at it the butt is mistaken for a couch when there is no couch present. Normally it belongs to a whale of large stature.
That 700 bohemian whale has a couch butt. I know I saw her sit down.