What does "water under the bridge" mean?
1. Definition (expr.) no longer an issue or problem
Examples My brother was mean to me when we were kids, but that’s all water under the bridge. We get along great now.
Examples I apologized to Ruth for laughing at her, but she said it was water under the bridge. I’m so relieved she’s not angry with me.
Examples Kenny and I had a horrible breakup, but that’s water under the bridge. We’re good friends now.