The routine is a set of sexual actions performed to enhance intercourse. The routine begins with the female bending backwards and grabbing her ankles or lower legs. She then (with assistance from the male if necessary) rolls forward onto the male's erect phallus. Once the penis is thoroughly mounted the male grabs the still rolled female and proceeds to rotate her 360 degrees on his penis.
Guy1 - "DUDE! How was the date with that yoga teacher last night?"
Guy2 - "Broski, it was awesome! I gave her the Ol' Michelin Tire Routine! It was totally sweet!"