water under the bridge

a bridge too far

A step or action that is too ambitious; an act of overreaching.

blood in the water

In a competitive situation, the exhibition of apparent weakness or vulnerability by one party, especially when this leads to a feeling of vulnerability or greater pressure to perform on the part of the weak party, or enhanced expectation of victory by the others.

blood is thicker than water

Family relations and loyalties are stronger than relationships with people who are not family members.

blow out of the water

To trounce; to defeat thoroughly, as at a game or in battle.

bridge over troubled waters

Someone or something that provides support, comfort, and a means to overcome difficult times.

bridge the gap

To serve as or create a connection between disconnected or disparate things.

burn that bridge when one comes to it

To anticipate dealing with a problem or situation either by acting in a manner that alienates or cuts ties with others, or merely with the expectation of encountering trouble.

carbonated water

Water that contains carbon dioxide dissolved in it under pressure and is intended for drinking.