Biddy Back Ride Share definition Flag when a guy is fucking a girl (his biddy) doggy style and then jumps on her back while still fucking her making her give him a piggy back ride whilst fucking "Dude i was fucking my girl last night and she totally gave me a biddy back ride" Biddy Back Ride by nighthawk8669 July 25, 2009 Get the Biddy Back Ride mug.