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when one's dick becomes so hard that they cannot control actions such as: cheating, being an asshole, and in extreme cases, rape.
Dude, i had a horrible case of iron dick at that party last night.
by t coxx January 28, 2008
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2
someone who's dick gets so hard it's like metal
Natalie: so did you give him a blowjob?

Ramona: Yeah it was great he had iron dick.
by asshat bridges May 28, 2017
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