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A local Chicago sexual move, based off of the ever-popular Chicago "L" transportation system. The Belmont Connection is where passengers can connect from the Red Line to the Brown Line on the train.

In sexual terms, a man fucks a woman in her vagina and then proceeds to give her anal pleasure. Hence, moving from the "Red Line" to the "Brown Line".
Derrick: Hey Jamaal, you gonna get with that white girl, Tiffany?

Jamaal: You mean Tiffany from Lincoln Parkl? Yeah, I'm finna give her the Belmont Connection.

Derrick: GNR, better pack some KY and extra Jimmies.
by Afties January 25, 2011
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