carbonated water

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.

carry someone's water

To do someone's bidding; to serve someone's interests.

carry water for

To perform menial tasks for; to serve; to assist; to be forced by politics or pragmatism to endorse or promote a belief, individual, or organization that in reality one does not fully support.

Chinese water torture

Any repeated irritation that builds to deliver cumulative damage.

chum in the water

Synonym of blood in the water.

clear blue water

An obvious, unambiguous divide between the policies of two parties.