Fill a cocktail shaker with ice. Then pour the dark rum, pineapple juice, orange juice, and cream of coconut into the shaker.
Cover and shake vigorously until chilled, about 30 seconds.
Fill a glass with ice and strain the cocktail into the glass.
Grate some fresh nutmeg over the top of the drink. Garish with half an orange slice and enjoy!
Notes
Freshly grated nutmeg is a whole other world from ground nutmeg. I highly recommend it. If you only have ground nutmeg on hand, that's okay to use too.