BBY/ABY is used to position items along the Star Wars Timeline. BBY refers to Before the Battle of Yavin. ABY refers to After the Battle of Yavin. The Battle of Yavin in Episode IV: A New Hope occured in 0 BBY/ABY.
Jabba the Hutt has lost his lucky charm somewhere in the palace, and he'll be very unhappy if Jubnuk the Gamorrean guard can't find it for him. Jubnuk knows he isn't too bright, but he figures it can't be that hard to find a simple talisman ... or can it? If Jabba could just give him a little more information about his good-luck charm—after he's finished talking with that important-looking Jedi Knight, Luke Skywalker, of course....