MilSaint's definitions
Enter an automatic car wash with your partner in the passenger seat. Once in the car wash proceed to jump in the backseat and fuck, but finish and be back in the front seat by the time the car wash is over.
Her: “Babe I’m feeling filthy. What do you want to do?”
Him: “How about the Backseat Splash and Dash?”
Him: “How about the Backseat Splash and Dash?”
by MilSaint May 3, 2018
Get the backseat splash and dashmug.