nibble on

nibble on

v.
1. To eat something by taking small, quick bites, often as a snack or a light meal: Dinner wasn't for another two hours, so I nibbled on some potato chips. The rabbit nibbled on a carrot.
2. To bite something but not break the surface: Nervously, I nibbled on my pencil's eraser during the test.
See also: nibble, on