A person who
clings to the
couch, gets stoned, and sleeps. Much like a koala who clings to trees, gets high off the
eucalyptus leaves, and sleeps most of the day.
Jane: Did you go to
the movies with Tom?
Sarah: No, all he does is
get baked, plays Call of Duty on his
couch, and sleeps!
Jane: What a koala!!