"I can't breathe" is a slogan associated with the Black Lives Matter movement in the United States. The phrase originates from the last words of Eric Garner, an unarmed man who was killed in 2014 after being put in a chokehold by a New York City Police Officer. A number of other Black Americans, such as Javier Ambler, Manuel Ellis, Elijah McClain, and George Floyd, have said the same phrase prior to dying during similar law-enforcement encounters. According to a 2020 report by The New York Times, the phrase has been used by over 70 people who died in police custody.

Black Lives Matter (BLM) is a decentralized political and social movement that seeks to highlight racism, discrimination, and racial inequality experienced by black people and to promote anti-racism. Its primary concerns are police brutality and racially motivated violence against black people. The movement began in response to the killings of Trayvon Martin, Michael Brown, Eric Garner, and Rekia Boyd, among others. BLM and its related organizations typically advocate for various policy changes related to black liberation and criminal justice reform. While there are specific organizations that label themselves "Black Lives Matter", such as the Black Lives Matter Global Network Foundation, the overall movement is a decentralized network with no formal hierarchy. As of 2021, there are about 40 chapters in the United States and Canada. The slogan "Black Lives Matter" itself has not been trademarked by any group.