`` Just Say No '' was an advertising campaign , part of the U.S. `` War on Drugs '' , prevalent during the 1980s and early 1990s , to discourage children from engaging in illegal recreational drug use by offering various ways of saying no . .
`` Just Say No '' was an advertising campaign , part of the U.S. `` War on Drugs '' , dominant during the 1980s and early 1990s , to discourage children from engaging in illegal recreational drug use by offering various ways of saying no . .