red cent

WordReference Random House Unabridged Dictionary of American English © 2025

red′ cent′, [Informal.]

1. Informal Terms a cent, as representative of triviality:
   His promise isn't worth a red cent.

• 1830–40, American.

Collins Concise English Dictionary © HarperCollins Publishers::

red cent noun

1. (used with a negative) a cent considered as a trivial amount of money (esp in the phrases not have a red cent, not worth a red cent, etc)