A person who spends a good majority of the day on the shitter, usually the nice roomy one on the end, doing usefull things like checking email, looking at pictures of cats, primping his pubes, and just generally wasting time so as not to be forced into doing any actually work.
Any time I have the urge to purge I check our resident shitter squatter's office to make sure he is present and accounted for.

Jim: "Where's Warren?"
Steve: "Check the bathroom, I haven't seen that shitter squatter in 45 minutes."
by JesterPrim October 28, 2014
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