Someone who is keen on mouthing cocks. He or she who is self proclaimed or even suspected of enjoying a penis in the mouth or even on the lips with only a threat of oral entry.
Sara: Yeah I think he was ready to give up on me until he found out I was a cockmouther. Hey pal get your fucking calogne selling ass off my fucking property you fucking cockmouther mother fucker!!!!!
by The Blind Inventor March 07, 2008

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