nybble

nibble

A four-bit aggregation of digital information, playfully named because it is half the de facto size of a byte. Sometimes spelled as "nybble" to reflect the spelling of "byte." The compression system packs an item of information into one nibble of a byte while the other nibble is set as a destination flag. I've written a script that cycles through and replaces corrupted nybbles.
Farlex Dictionary of Idioms.

nibble

1. n. a cautious or preliminary response to something. (see also nybble.) My advertisement got three nibbles this morning.
2. in. to reply cautiously or tentatively to something. I hope someone who wants to buy my car nibbles at the description I posted on the Internet.

nybble

(ˈnɪblæ)
n. four bits of computer memory. (Literally, one half of a bite, i.e., a byte.) My program wouldn’t work just because I had one silly little nybble wrong!
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • nibble
  • nibble (away) at (something)
  • nibble (away) on (something)
  • The Land of Opportunity
  • kicken
  • kickin’
  • joy box
  • joybox
  • wall-eyed
  • Lady Luck