to overdo; to go too far; to go to excess
練習を遣り過ぎて体を壊した。
I overdid practice and ruined my health.
遣り過ぎたと気づいたときは手遅れだった。
By the time I realized I had overdone it, it was too late.
調子が良くても遣り過ぎないよう気をつけた。
Even when I was feeling good, I was careful not to overdo it.