Friends don't let friends drive drunk.

“Friends don’t let friends drive drunk” is a late-20th-century U.S. public-safety slogan associated with anti–drunk driving campaigns and designated-driver messaging. It circulated widely on posters, bumper stickers, and public service announcements, framing intervention as a social responsibility rather than merely a personal choice. The line’s anonymity reflects its function as a piece of campaign copy rather than a literary aphorism: it was repeated and adapted across organizations, schools, bars, and community programs, especially as drunk driving became a prominent public issue in the 1980s–1990s. The phrase’s power comes from its appeal to peer influence and friendship norms—encouraging people to take keys, call a ride, or otherwise prevent impaired driving.

The slogan asserts that genuine friendship includes active care, even when it requires confrontation. By casting prevention as something “friends” do, it shifts the moral burden from the intoxicated driver to the surrounding group: bystanders are not neutral observers but participants with agency. The phrase also leverages social identity—most people want to be the kind of friend who protects others—making intervention feel like loyalty rather than policing. Implicitly, it recognizes that impaired judgment is part of intoxication; therefore, ethical action may require overriding a friend’s immediate wishes to avert harm to the driver, passengers, and the public.

“Friends don’t let friends drive drunk.”
“Friends don’t let friends drink and drive.”
“Don’t let your friends drive drunk.”