Nothing. Usally used to answer a question given by a friend. Can mean none too. Great for conversations with people who you want to confuse. Never explain the meaning to parents. Just dont.
1. John: What did you get on the assignment?
Rebecca: Bubkiss, i didn't hand it in.
2. Audri: What did she tell you?
Emily's little brother Anthony... He deserves a whippin
i hate that little bubkiss