When you fuck a girl from behind who is taller than you so you have to sort of climb on her back like a backpack to fuck her. It's similar to doggy style
Yo, I totally hooked up with that volleyball chick, but she was taller than me so I had to fuck her backpack style
by coolman222 December 9, 2020
When your sexual partner is giving you a piggy back ride and you are giving it to him/her in the butt.
by Purplesmurf123 October 17, 2008