to walk into a dance club and see a bunch of hot bitches; when you leave you tell your buddies that you got an instant hard on in front of your wife.
man, I just walked into the club and "instant hard on"
by Ziggy21 August 10, 2008
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A thing or event which is so unattractive that it can cause a man to lose an erection instantly, or even render him temporarily impotent.
When my girfriend pooped during sex, it was like instant hard-on remover
by GameboyRMH November 27, 2004
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