Nixon /ˈnɪk.sɪn/noun 1forms 1phrases 1 noun1 •(slang) A drug of low quality and low potency passed off as a powerful, pure drug. formsNixons Phrases with Nixon Nixon in ChinaSuggesting the ability of a politician with an unassailable reputation among his or her supporters for representing and defending their values to take actions that would draw their criticism and even opposition if taken by someone without those credentials.