claptrap (n.)youdaoicibaDictYouDict[claptrap 词源字典]
c. 1730, "trick to 'catch' applause," a stage term; from clap (v.) + trap (n.). Extended sense of "cheap, showy language" is from 1819; hence "nonsense, rubbish."[claptrap etymology, claptrap origin, 英语词源]