Wash the limes well, then cut off the ends and cut them into quarters.
Add the lime quarters into a high power blender with the sweetened condensed milk, sugar, about 3 cups ice, and 3 cups water.
Blend for about 20 seconds (do not overblend).
Strain the mixture through a fine mesh strainer.
Serve over ice with a shot or 2 of your favorite spirit.
Use a straw to mix the alcohol in and garnish with a lime wedge.
Enjoy!
