Peel the mangoes carefully and chop the flesh into small chunks, making it easier for the blender to process.
Add the chopped mangoes, citrus juice, honey (if using), and ice cubes into the blender jar.
Pulse the blender on high until everything starts to break down, then blend continuously for 30-45 seconds until the mixture is smooth and icy with a vibrant color.
Stop the blender and check the consistency; if it's too thick, add a splash of citrus juice or water and blend again briefly.
Pour the slushie into chilled glasses, allowing the icy mixture to mound slightly over the rim.
Serve immediately with a straw or a garnish of fresh mango or citrus slices for an extra tropical touch.