Add the rum, Falernum liqueur, pimento dram, fresh lime juice, fresh orange juice, honey syrup, and aromatic bitters to a mixing glass.
Fill the mixing glass with about 9 ounces of crushed ice. Flash-blend until well combined, you can use an immersion blender.
Strain the blended cocktail into a mug or a pilsner glass. Garnish with 3 maraschino cherries on a cocktail pick and a pineapple frond. Serve immediately with a straw.