Combine the chopped fresh fruit, simple syrup, lemon or lime juice, and vodka in a blender.
Add the ice cubes to the blender and secure the lid tightly.
Blend on high speed until the mixture is smooth and slushy, with a thick but pourable texture, about 30-40 seconds.
Scrape down the sides of the blender as needed and give a quick pulse to ensure everything is evenly blended.
Check the consistency; it should feel icy but scoopable, with small ice shards visible throughout.
Pour the chilled, icy slush into glasses, making sure each serving has a good mix of fruit and ice.
Optionally, garnish with extra fruit slices or a sprig of mint for a festive look.
Serve immediately to enjoy the refreshing, tart, and icy texture.