The term 'Just Say NO' is a phrase that was popularized in the 1980s as part of an anti-drug campaign. The phrase is used to encourage people to refuse offers of drugs or alcohol. The crossword solutions for this term are NO (2 letters), AH (2 letters), and LETS (4 letters). NO is an emphatic way of saying NO, AH is an expression of surprise or realization, and LETS is an abbreviation of the phrase 'let us'. Together, these three words form the phrase 'Just Say NO'.