claptrap

The word 'claptrap' originated in the early 18th century theatrical world. It was a literal term for a 'trap' or trick on stage designed to elicit 'clap'ping—applause—from the audience. This could refer to a contrived line of dialogue, a spectacular piece of stage machinery, or any cheap theatrical device aimed solely at winning immediate, unthinking approval. Over time, the term evolved beyond the theater to describe any insincere, showy, or nonsensical talk or writing whose primary purpose is to capture shallow applause or admiration, thus transforming from a concrete theatrical technique into an abstract metaphor for empty rhetoric.

Structure: clap (to strike) + trap (a device) - clap: From Middle English 'clappen', of imitative origin. Its functional role is to convey the sense of striking hands together to produce applause. - trap: From Middle English 'trappe', from Old English 'træppe'. Its functional role is to convey the sense of a snare or a contrivance.