a scrap
Definitions
A small piece or amount of something, especially one that is left over after the greater part has been used.
A short, informal fight or argument.
Discarded metal or other waste material suitable for reprocessing.
Examples
He wrote the phone number down on a scrap of paper.
The two dogs got into a scrap over a bone in the backyard.
Synonyms
a fragment a bit a morsel a remnant a shred a particle a sliver