1. to coin or mint (money) incorrectly or fraudulently
Usage: transitive verb; archaic or historical
2. to invent or create (a word or phrase) incorrectly or inappropriately
Usage: transitive verb; rare

Examples

• The forger was caught trying to miscoin currency in his basement workshop.
• Medieval rulers sometimes miscoined money to debase the currency.
• He was accused of miscoining the term in his academic paper.
• The mint's error led to miscoined coins entering circulation.
• To miscoin a phrase is to use language in an unintended or incorrect way.