to have multiple dates with different people, in a 24 hour span. Unlike "serial dating," it is specific to the two dates in one day - not an ongoing dating relationship with multiple people.
Guy1: What are your plans tonight?
Guy2: I'm double dating Kara & Veronica. Dinner with Kara at TheRestaurant, then picking up Veronica and getting drinks at TheBar.
Prices shown in USD.