Using a butter knife (or a small offset spatula), spread marshmallow fluff around rims of glasses. Add shredded coconut to a shallow bowl, then dip the tops of glasses in coconut, adhering the coconut to the fluff.
In a large pitcher, stir together coconut milk, tequila, triple sec, pineapple juice, and lime juice.
Add ice to glasses then pour over margarita mixture.
Recipe by The Best Video Recipes for All at https://recipes-for-all.com/cottontail-margaritas/