nibbler

He has needed elbow surgery, lacked confidence in his stuff at times and been a nibbler.

He is never bigger than Nibbler the House Mouse and often is much smaller.

The biscuit-nibbler selected a fresh dainty from the counter, and Wingate abstractedly walked to the window and rubbed the glass.

This redoubtable nibbler, which is often a foot in length, never betrays itself; it only works within.

And when the Mice came in haste at dawn, Bread-nibbler stood up first, enraged at his son's death, and thus he spoke.

But the Venetian shopkeepers are not clever: they have not the sense to leave the nibbler alone.