とんでもはっぷん

expression

it'll never happen; absurd; outrageous; preposterous

Dated humorous phrase blending とんでもない (outrageous) with English 'happen'. Used to dismiss an idea as impossible or ridiculous. Now mostly a nostalgic or jocular expression.

See also: とんでもない

• 「宝たからくじが当あたったら会かい社しゃを辞やめるよ」「とんでもはっぷん、そんなの無む理りだよ」

  "If I win the lottery, I'll quit my job." "It'll never happen — that's impossible."

• 彼かれが遅ち刻こくしないなんて、とんでもはっぷんだよ。

  Him not being late? That's preposterous.