Entry
  1. Interjection (kandoushi)

    oops; uh oh; drats

    「あっ、後続のパーティが来たみたいだな」「あちゃー。休んでる間に追いつかれちゃったわね」
    "Ah, the trailing group has arrived." "Oh no. They caught up with us while we were resting."

Also written あちゃーあっちゃーあちゃああちゃ

Pitch on OJAD