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1.) the point of the conversation where a person first uses the word fuck. from then on anyone can fuck the conversation without it being inappropriate

2.) a measure of the speed of a relationship.
1.) Eunice Bloom: Well, since we've broken the "Fuck
Barrier," allow me to be blunt.

2.) Girls worth dating never break the fuck barrier on the first date.
by booshchugger March 28, 2010
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A barrier used to block the view of any bystanders that may happen to see two people fucking.
She said she didn't want to do it in the room because of my roommate... Thank God for my fuck barrier
by fred_oakley September 02, 2010
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