石いし合がっ戦せん

noun

stone-throwing fight; stone battle

Historical term for a mock battle or brawl using stones, often associated with children's play or local conflicts in pre-modern Japan.

• 昔むかしの子こ供どもたちは石いし合がっ戦せんをして遊あそんだという。

  They say that children in the old days played at stone-throwing fights.