My sister-in-law Diana used to work at a Brazilian restaurant, and would mix up the drinks that were ordered. She made this for a family get together, and it was so good. It is kind of fun to mix up a special drink to have with a Sunday meal, it just adds that extra special touch. You must have a really good blender to whip up the limes with skin on. If your blender kind of stinks, just juice the limes, and then blend.
4 small limes, juiced or left w/ skin on 1 c sugar 4 generous spoonfuls of sweetened condensed milk
fill blender with water, and blend all ingredients, adding more sweetened condensed milk if necessary. Strain, then serve chilled.