Top definition
The obligatory vulgar banter that is initiated by the passengers of a car when one occupant engages in a phone call. Thought to have originated somewhere between late middle school and early high school.
Hey mom, yeah I promise to be home by 8

Oh Tommy, get your cock out of my ear!!! HAHAHA

No mom, I swear it's just Backseat Banter

Cock and Ball Sandwich!!! HAHAHA

I love you mom.
by PseudonymJoe November 19, 2010
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