nibbler

noun4

1. •
   Someone who nibbles (in various senses).

   • 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: — 1599
2. •
   A tool for cutting sheet metal.
3. •
   A fish of the sea chub subfamily Girellinae.
4. •
   (historical) A program for copying floppy disks at a low level (typically one bit at a time) to circumvent protection systems.

   • A-Copier. MegaSoft, Ltd. Full Featured Nibbler. — 1988