Urban Dictionary: Definitions by Slinlycunt12

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Biosex

Having sex with your biological sister or brother.

Jimmy, you need to stop having biosex with your sister.

by Slinlycunt12 December 10, 2021

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FlyFucking

Having sex on anything that flys.

Me and my step daughter love to FlyFucking in the holiday season.

by Slinlycunt12 December 17, 2021

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