Rabri Laloo's wife....

Two young friends (Bunty and Chinto) were standing on the flatform of Bihar. After standing there for one hour, Bunty went to buy sweets from a shop 5 meters away. When he came back, he was crying.

Chinto: what happened to you?
Bunty: The shopkeeper slapped me.
Chinto: Why? What did you ask him?
Bunty: I only asked him - "rabri ka bhaw kyan hai?"

rabri as in a sweet and Laloo's wife....