A person who watches excessive amounts of television, has no job, no ambition, no goals set for his/her life, respects whores instead of engaging in sexual activity, also no reguards for ones possesion ex. vehicles, living conditions etc.
the slang expression often assciated with ppl who watch a lot of TV. tv is made of electron tube. "couch potato" is said to refer to the potato b/c it is a tubular vegatable w/ eyes (lil blacks specks on the potato) to symbolize some1's yeys, glued to the tube...
one is able to substitute any word of choice for potato. such as..."couch prune"....however, it has been combined with more derrogitory terms. for example..."couch fag."