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1.
The state of people knowing you have had sex. Like your actual virginity, once lost it cannot be regained. However, you can lose it multiple times: once for each person who finds out you are not a virgin.
Girl 1: Dude, I totally lost my public virginity last night.
Girl 2: What happened?
Girl 1: I accidentally let slip to Mike's mum that we did the dirty in her bed last summer.

My ex-girlfriend cracked a joke about my penis in assembly... I guess I just lost my public virginity in front of the whole school.
by Kya-chan November 08, 2010