"Just Say No" is a campaign that began in the 1980s to discourage drug use among young people. It encourages individuals, especially children and teenagers, to refuse drugs and alcohol by simply saying "no" when offered. The initiative aimed to empower youth to make healthy choices and resist peer pressure. The campaign was popularized by Nancy Reagan, the wife of former U.S. President Ronald Reagan, who promoted it as part of a broader effort to combat drug abuse. "Just Say No" became a slogan and was used in various educational programs, community events, and media campaigns to raise awareness about the dangers of substance abuse.