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Idioms and Phrases with in bad faith

in bad faith

With the intention of deceiving someone or doing harm, as in I'm sure they were acting in bad faith and never planned to pay us. This expression was first recorded in 1631. The antonym, in good faith, meaning “sincerely and honestly,” as in I signed that contract in good faith, dates from about 1350.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.