Top Definition
You lose your "fratginity" the first time you have sex with a guy in a fraternity. However, you have only lost your fratginity in that specific house, you remain a fratgin in all remaining fraternities.
"Shit, I was so blackout last night, I lost my fratginity at PKA! I had sex with Jethro!"
by whorecouch November 09, 2006

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