もっけ

noun which may take the genitive case particle 'no', na-adjective, noun

unexpected; fortuitous; unlooked-for

Describes something that happens unexpectedly, often with a nuance of being a lucky or strange coincidence. Commonly used in the set phrase もっけの幸い (an unexpected piece of good luck).

• もっけの幸さいわいで、ちょうど電でん車しゃが来きた。

  By a stroke of luck, the train arrived just then.

• それはもっけな話はなしだ。

  That's an unexpected turn of events.