flapdoodle (n.)youdaoicibaDictYouDict[flapdoodle 词源字典]
1833, originally "the stuff they feed fools on" [Marryat]; probably an arbitrary formation from elements meant to sound ridiculous, perhaps with allusions to flap "a stroke, blow" and doodle "fool, simpleton."[flapdoodle etymology, flapdoodle origin, 英语词源]