nibble

v. (-ling) 1 (foll. By at) a take small bites at. B take cautious interest in. 2 eat in small amounts. 3 bite at gently, cautiously, or playfully. n. 1 act of nibbling. 2 very small amount of food. [low german or dutch]

v. t. To bite by little at a time; to seize gently with the mouth; to eat slowly or in small bits.