Couch Companion 

Someone of the opposite sex, male or female, often an intimate friend, with whom one engages in make-out type activity (often while watching a movie), or even actual sex, but where said activity is limited to the couch and is not reflective of the overall relationship.

Sue: "Mary, is that your boyfriend over there?"
Mary: "Naw, he's just a Couch Companion..."

Couch Companion by Anthrage June 29, 2011

Companion Couch 

A super-comfy couch, with an in-built phone charger.

Is that a Companion Couch? That couch is completely rad!

Companion Couch by givesies February 22, 2018