Four Car Garage
Inserting your penis as well as both testicles (and scrotum obviously) into a vagina (or rectum).

This is one step past "balls deep."
Bro 1: Bro, I'm not just gonna go balls deep on her, I'm gonna park my whole fleet in her garage.

Bro 2: Oh, you're pulling a Four Car Garage?

Bro 1: Totals.

*high five*