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An act that occurs whilst taking a shit with a boner. The participant pushes their penis downwards to avoid pissing on their feet due to ther penis being elongated. This results in the participants shit scraping their penis as it descends from their assehole. the result is brown shit on your penis that gives it a vintage, rusty look.
Never wank before you shit because a Rusty Rod is a likely outcome
by hot97rocksmyworld February 15, 2014
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When you are giving it to your girl during shark week and she decides to pull it out and put it in her mouth.
Bro, I was slamming that tinder hoe last night and she totally gave me a rusty rod!
by Th3OriginalOn3 June 23, 2018
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