claptrap

• clap trap, clap-trap

Theater slang, c. 1730, from clap +‎ trap, referring to theatrical techniques or gags used to incite applause.

• (UK, US) IPA^(key): /ˈklæpˌtɹæp/

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claptrap (countable and uncountable, plural claptraps)

1. Empty verbiage or nonsense. [from early 19th c.]

   Synonyms: hot air, palaver, waffle; see also Thesaurus:nonsense

   • 2014 November 6, Rob Nixon, “Naomi Klein’s ‘This Changes Everything’”, in The New York Times‎:

     Klein diagnoses impressively what hasn’t worked. No more claptrap about fracked gas as a bridge to renewables. Enough already of the international summit meetings that produce sirocco-quality hot air, and nonbinding agreements that bind us all to more emissions.

2. (historical) A device for producing a clapping sound in theaters.
3. A device or trick to gain applause; a humbug.
   • 1869 May, Anthony Trollope, “Lady Milborough as Ambassador”, in He Knew He Was Right, volume I, London: Strahan and Company, […], →OCLC, page 83:

     There had been a suggestion that the child should be with her [while she answers the door], but the mother herself had rejected this. "It would be stagey," she had said, "and clap-trap. There is nothing I hate so much as that."