To stop pursuing something about which there is a dispute, disagreement, etc.

(US, politics, law enforcement) A phrase used to counter "black lives matter", rallying people to defend police officers and their use of lethal force in carrying out their duties.

(US, politics, often offensive) A response to "black lives matter" (the phrase, its political and social movement), suggesting that African-American people should not be singled out for special attention.

(US, politics, offensive, white supremacy) A phrase used to protest against "black lives matter" (rally call, political and social movement) by white people, to protect their traditional white prerogatives and privileges.

(politics) A rallying call and statement of protest, concerning police brutality and racially motivated violence against black people.

(US, law enforcement, politics) Synonym of police lives matter

(physics) The field of physics dealing with the physical properties of solid or liquid matter.

(astronomy, physics) dark matter comprising elementary particles whose composition is as yet unknown, but is presumed to be unlike normal protons, neutrons and electrons etc.

Synonym of any way one slices it

(idiomatic) To deal with a problem alone instead of waiting on others (often persons who are responsible and have failed to deal with the issue).