nibbler

Etymology

nibble +‎ -er

Noun

nibbler (plural nibblers)

1. Someone who nibbles.
   • 1599, Anonymous, "Sweet Cytherea, sitting by a brook" in The Passionate Pilgrim,

     But whether unripe years did want conceit, / Or he refused to take her figured proffer, / The tender nibbler would not touch the bait, / But smile and jest at every gentle offer:

   • 1944, Emily Carr, The House of All Sorts, Chapter,

     The dog's lean, powerful body dashed down the hill. When the dust of his violence cleared, a sea of dirty white backs was wobbling up the hill, a black-and-white quickness darting now here, now there, straightening the line, hurrying a nibbler, urging a straggler.

   • 1949, Guiding Family Spending, U.S. Department of Agriculture Miscellaneous Publication No. 661, p. 10,

     In carrying out a spending plan, accounts are usually most important for controlling small recurring expenditures as for newspapers, magazines, tobacco, movies, soft drinks, ice cream, and meals eaten out. Many families look upon these as incidentals and may treat them as unimportant. But they may be nibblers, eating away day by day money that is wanted for other things.

2. A tool for cutting sheet metal.
3. A fish of the sea chub subfamily Girellinae.