In a Kansai owarai pair you've got the idiot (boke) and the straight man (tsukkomi) who says 'Nandeyanen! and optionally hits the boke. All the girls here are saying Nandeyanen, which you could translate as something like 'What the hell' or 'You've got to be kidding'.
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You've got to be kidding...You've got to be kiddingYou've go~~t to be kidding.You've got to be kidding!!!