1 (750 milliliter) bottle coffee flavored liqueur (such as Kahlua®)
1 (750 milliliter) bottle vodka
1 (750 milliliter) bottle Irish cream liqueur (such as Panama Jack®)
6 quarts eggnog
Chill the coffee liqueur, vodka, and Irish cream in the refrigerator at least 12 hours.
Pour the coffee liqueur and vodka into a 12-quart punch bowl. Whisk in the Irish cream, followed by the egg nog. Whisk until evenly blended. Serve immediately.