An exceedingly firm clench, hold, or grasp around the shaft of the victim's penis, that is so forceful that it is deemed 'iron'. It is painful, and commonly used for, a bargaining piece, a way of releasing anger, an action of aggression, or to see the look on their face.
"I got George in such a good Iron Cock Clench that he almost pooped himself."
by urbandefiner2000 May 7, 2015
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