脳のう内ないお花はな畑ばたけ

noun

happy-go-lucky person; dreamer; someone with their head in the clouds

Derogatory slang for a person who is unrealistically optimistic or naive, as if their brain is a field of flowers. Often used critically to describe someone who ignores reality.

• あの人ひとは脳のう内ないお花はな畑ばたけだから、現げん実じつ的てきな話はなしが通つうじない。

  That person is such a dreamer that realistic talk doesn't get through to them.

• 彼かの女じょの脳のう内ないお花はな畑ばたけな発はつ言げんには呆あきれてしまう。

  I'm amazed at her head-in-the-clouds remarks.