Top Definition
A colon-clouter is a homosexual man who likes to put his penis inside the rectum of other homosexual men for the purpose of sexual pleasure.

It is the number one cause of shitty semen.
"Check out than man over there in that tight tank top, dancing in that gay bar with those other men. I bet he's a right colon-clouter."
by radash November 07, 2009
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