← DefinitionshareGuessdarndestnounThe greatest or most extreme effort or attempt; used in the phrase 'one's darndest' to mean one's best or utmost.adjectiveUsed as a mild exclamation to express surprise, annoyance, or admiration; a euphemism for 'damned' or 'darned'.Synonymsbestnounutmostnoundarnedadjectivedamnedadjective