flapdoodle UK /ˈflæpˌduːdl̩/US /ˈflæpˌdud(ə)l/noun 3verb 1forms 3 noun3 •Nonsense.‘The gentleman has eaten no small quantity of flapdoodle in his lifetime.’ ‘What’s that, O’Brien?’ replied I. ‘Why, Peter,’ rejoined he, ‘it’s the stuff they feed fools on.’ — 1834 •Thingamabob.Then there was the noble but unseen army of perspiring heroes who wrestled with furniture and wings and other flapdoodles behind the curtain. — 1929 •A speaker or writer of nonsense.Here, So-and-so ”—to some one on whose countenance a faint gleam of comprehension was discernible—“ tell these flapdoodles of the ages what I mean.” — 1893 verb1 •To con; to deceive with nonsense.Now, however the innocents may be flapdoodled by such jugglery the guilties remain undeceived. — 1911 formsflapdoodled · flapdoodling · flapdoodles