Biddy Bapp Share definition Flag Very liberal Vermont term for the word Bitch. Not necessarily in a negitive tone or context. Man, let's get up outta this BIDDY BAPP. OR Hold up! I'm try'n to holla at this lil' BIDDY BAPP. Biddy Bapp by Tru Ruler December 20, 2007 Get the Biddy Bapp mug.