▁Gh il ' ad ▁Z uck ermann , ▁some ▁lay men ▁wrong ly ▁believe ▁that ▁the ▁English ▁word ▁but ter fly ▁der ives ▁from ▁ ▁flutter ▁by . ▁ ▁Kn ifer isms ▁and ▁for ker isms ▁As ▁comple ments ▁to ▁sp oon er ism , ▁Douglas ▁Hof stad ter ▁used ▁the ▁non ce ▁words ▁kn ifer ism ▁and ▁for ker ism ▁to ▁refer ▁to ▁changing , ▁respectively , ▁the ▁v ow els ▁or ▁the ▁final ▁con son ants ▁of ▁two ▁sy ll ables , ▁giving ▁them ▁a ▁new ▁meaning . ▁Ex amples ▁of ▁so - called ▁kn ifer isms ▁include ▁a ▁British ▁television ▁news reader ▁once ▁referring ▁to ▁the ▁police ▁at ▁a ▁crime ▁scene ▁removing ▁a ▁' h yp ode em ic ▁n erd le '; ▁a ▁television ▁announ cer ▁once ▁saying ▁that ▁" All ▁the ▁world ▁was ▁thr illed ▁by ▁the ▁marriage ▁of ▁the ▁D uck ▁and ▁Do och ess ▁of ▁W inds or "; ▁and ▁during ▁a ▁live ▁broadcast ▁in ▁ 1 9 3 1 , ▁radio ▁present er ▁Harry ▁von ▁Z ell ▁accident ally ▁mis pr on oun cing ▁US ▁President ▁Herbert ▁Ho over ' s ▁name ▁as ▁" H oo bert ▁He ever ." ▁Us age ▁of ▁these ▁new ▁terms ▁has ▁been ▁limited ; ▁many ▁sources ▁count ▁any ▁sy ll able ▁exchange ▁as ▁a ▁sp oon er ism , ▁regardless ▁of ▁location . ▁ ▁See ▁also ▁ ▁Blo oper ▁Cr ash ▁bl oss om ▁Fre ud ian ▁s lip ▁Mal ap rop ism ▁Met ath esis ▁Mon deg reen