letter ▁word ▁in ▁his ▁novel ▁Finn eg ans ▁W ake , ▁the ▁most ▁famous ▁of ▁which ▁is ▁Bab abad alg har ag ht ak am min ar ron n k onn br on nt on ner ron nt u onn th un nt ro var r hou na wn ska wn to oh o oh o orden enth urn uk . ▁App ear ing ▁on ▁the ▁first ▁page , ▁it ▁alleg edly ▁represents ▁the ▁symbol ic ▁th under c lap ▁associated ▁with ▁the ▁fall ▁of ▁Adam ▁and ▁E ve . ▁As ▁it ▁appears ▁now here ▁else ▁except ▁in ▁reference ▁to ▁this ▁passage , ▁it ▁is ▁generally ▁not ▁accepted ▁as ▁a ▁real ▁word . ▁Syl via ▁Pl ath ▁made ▁mention ▁of ▁it ▁in ▁her ▁semi - aut obi ographical ▁novel ▁The ▁Bell ▁Jar , ▁when ▁the ▁protagon ist ▁was ▁reading ▁Finn eg ans ▁W ake . ▁ ▁" Super cal if rag il ist ice xp ial ido cious ", ▁the ▁ 3 4 - letter ▁title ▁of ▁a ▁song ▁from ▁the ▁movie ▁Mary ▁Po pp ins , ▁does ▁appear ▁in ▁several ▁diction aries , ▁but ▁only ▁as ▁a ▁proper ▁n oun ▁defined ▁in ▁reference ▁to ▁the ▁song ▁title . ▁The ▁attributed ▁meaning ▁is ▁" a ▁word ▁that ▁you ▁say ▁when ▁you ▁don ' t ▁know ▁what ▁to ▁say ." ▁The ▁idea ▁and ▁in vention ▁of ▁the ▁word ▁is ▁cred ited ▁to ▁song writ ers ▁Robert ▁and ▁Richard ▁Sh erman . ▁ ▁A gg l ut in ative ▁constru ctions ▁ ▁The ▁English ▁language