The "Russian Cab Driver" aslo known as the less familiar "backseat drunk- rider", is when you have sex with an individual in the anus, while holding their hair with one hand (like you are driving); as you take a shot of vodka.
"Dude, I heard that kid Dylan Russian Cab Drove the captain of the cheerleading team!" Matt: (in a Russian accent) " want to ride my cab?". Girl: " what, the Russian cab driver? Hell yes!"