You want a piece of me?!

Henry has gotten used to saying the word "piece" when he wants something to eat. For example, this morning he had a banana as part of his breakfast. He held it up and said, "piece."  Then he ate it. Later in the day he was saying piece about something. I wasn't sure what it was so I just said, "you want a piece of me?" He proceeded to pinch me with his fingers then pretend to feed me what he had just pinched off!