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The self-conscious mind of your penis that becomes erect, makes you incredibly uncomfortable, and floods your mind with nasty thoughts of masturbation to make the erection disappear.
Sally: Do you debate on whether to masturbate or not?
John: i dont even debate
John: i was just like eff no, get away from me you penis demon
by ashin999 October 03, 2011
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(n) One who abuses their penis-taking privileges for the advancement of their own well being.
Stay away from her - She's a penis demon.
by Penisdemon February 25, 2017
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