We found one dictionary that defines the word good coin:

General (1 matching dictionary)

1. good coin: Wiktionary

Definitions from Wiktionary (good coin) ▸ noun:  Something genuine or trustworthy. ▸ Words similar to good coin ▸ Usage examples for good coin ▸ Idioms related to good coin ▸ Wikipedia articles (New!) ▸ Words that often appear near good coin ▸ Rhymes of good coin ▸ Invented words related to good coin