なんでやねん
なんでやねん
expression
what the heck; why (Kansai dialect tsukkomi)
1.
what the heck; why on earth
A Kansai dialect expression used as a tsukkomi (retort) in manzai comedy, or to express surprise, disbelief, or exasperation at something illogical or absurd.
なんでやねん、そんなわけないやろ。
What the heck, that can't be right.
Register
Kansai (関西) dialect, iconic expression from Osaka comedy culture.
CULTURAL NOTE (comedy):
Central to 漫才 (manzai) comedy as the classic 突っ込み (tsukkomi - straight man's retort) to a ボケ (boke - funny man's absurd statement).
Common patterns
なんで (why) + や (copula, Kansai) + ねん (emphatic ending, Kansai)
Similar words
なんでだよ / どうしてだよ (standard Japanese)
Forms
Cultural note
This expression has become nationally recognized as a symbol of Osaka humor. It's often used playfully even outside Kansai.