nibbler
nounUK /ˈnɪblə/
US /ˈnɪblər/
A nibbler is someone or something that takes small bites of food.
The little rabbit was a slow nibbler, tasting every leaf in the garden.
OTHER MEANINGS
2. A tool or machine that cuts or shapes material with small biting strokes.
The metalworker used a nibbler to trim the edge of the sheet.
3. A person who eats only small amounts at a time.
At parties she is a nibbler, never finishing a full plate.
4. In computing, a device or routine that reads data in small pieces.
The old tape nibbler read the file one byte at a time.