A comps leech is someone who goes on a Vegas trip that is paid for mostly by comps from the rest of the group without actually providing any comps. This parasite tends to be a redder, which explains their inability to accumulate any substantial comps. Despite receiving a free room, they refuse to pay for even a $7 cab ride. They show no appreciation for the free stuff they are receiving, and often feel entitled to even more stuff.
Mich: How come I have to sleep on the cot???
Chi Chi: Because my back hurts, and because you are a comps leech.
Mich: That's BS. I think we should take turns.
Chi Chi: Yeah we dont care what you think. Next question.