当あたり外はずれ

noun

hit or miss; variation in quality; mix of success and failure

Describes something whose outcome or quality is inconsistent; can refer to luck, performance, or product variability.

• この店みせの料りょう理りは当あたり外はずれが大おおきい。

  The food at this restaurant is really hit or miss.

• ギャンブルは当あたり外はずれがあるから面おも白しろい。

  Gambling is fun because there are wins and losses.