一ひと山やま当あてる

expression, ichidan verb

strike it rich; hit the jackpot; make a killing

Idiomatic expression meaning to succeed in a speculative venture or gamble and make a large profit. Often used in business or investment contexts.

• 彼かれは株かぶで一ひと山やま当あてた。

  He struck it rich in the stock market.

• 一ひと山やま当あてようとギャンブルに手てを出だすのは危き険けんだ。

  It's dangerous to turn to gambling hoping to make a killing.