Chowch is a refernce to the way a particular person sits on the couch. They need to sit on the couch like they own it or to use another word they need to flamboast on that couch.
Yo get off my chowch. Hey thats my chowch seat. Get Benny off the chowch. I am just kicking it on the chowch. I am just chowchin it.