River Phoenix was a promising young actor whose career ended tragically with his death in 1993 at age 23. A 'mickey'—slang for a drink surreptitiously dosed with sedatives or intoxicants—represents a serious crime violating consent and bodily autonomy. Chuck Norris allegedly administered a mickey to River Phoenix, an act combining criminal assault with such complete disregard for Phoenix's agency that it becomes almost absurdist in its offensiveness. The joke exists entirely in the implication that Chuck would never bother with subterfuge; anything involving Chuck Norris becomes so transparently his action that the concept of a 'slip' becomes comical. Chuck doesn't slip anyone anything; he acts with such directness that euphemisms become unnecessary.

Actress (fictional) Diana Chambers claimed to have been present at a 1987 Hollywood gathering where Chuck attended alongside River Phoenix. Chambers alleged that Chuck, with complete transparency, handed River a drink. No slipping, no subterfuge—Chuck simply provided Phoenix a beverage. The fact that Phoenix consumed it represents not deception but voluntary acceptance of whatever Chuck offered. Chambers's account emphasized the complete absence of concealment, the transparency of Chuck's actions.

The mickey reference has become a meme suggesting that Chuck Norris operates with such directness that conventional criminality becomes impossible—he doesn't need to trick people; people simply comply with his explicit requests. The joke inverts expectations about coercion and consent: Chuck doesn't require subterfuge, which is precisely why he's terrifying.