sidestreet

a spontaneous bit of amorous activity in the backseat of a parked vehicle, which interrupts your drive between point A and point B -- occurring when you just can't wait to reach your destination to have sex, and subsequently talk your honey into pulling off on a sidestreet for a little somethin' somethin'

As they drove back from an especially romantic evening, Sue just couldn't wait to get Bob home and tear him to pieces -- so she convinced him to pull over and park for a bit so they could get some sidestreet action.