second-guess (v.)youdaoicibaDictYouDict[second-guess 词源字典]
1941, back-formation from second-guesser (1937), American English, originally baseball slang for a fan who loudly questions decisions by players, managers, etc.; perhaps from guesser in the baseball slang sense of "umpire."[second-guess etymology, second-guess origin, 英语词源]