What is the meaning of Kibble?

To grind coarsely.

Something that has been kibbled, especially grain for use as animal feed.

Any artificial animal feed in pellet form.

An iron bucket used in mines for hoisting anything to the surface.

A mallet used in the game of trap ball.

In the Transformers fandom, pieces of a toy or figure necessary for one mode, but appearing out of place or unnecessary in the other.

Source: wiktionary.org