I call this drink Christmas Passion, having witnessed its efficacy first hand.
This is a traditional recipe, the richest recipe I know, a surefire crowd pleaser.  This is about enough for four servings.
 3 egg yolks
 ½ cup sugar 125 mls
 2/3 cup dark rum 150 mls (I like Gosling’s but other people use amber rum, brandy or Canadian Whisky.) 
 1/3 [...]