look up any word, like the eiffel tower:
 
1.
When your sexual partner is giving you a piggy back ride and you are giving it to him/her in the butt.
Hey Shelly why is your back sore o me and my boy friend were just backpack style all weekend.
by Purplesmurf123 October 16, 2008

Words related to backpack style

anal ass back backpack boob boobs sex style tit