Pour the fresh pineapple chunks into a freezer-safe container and freeze for at least 2 hours, until firm but scoopable.
Measure out the chilled pineapple chunks and place them into your blender, adding honey or agave syrup for sweetness.
Optional: add coconut water or a splash of water to help with blending and adjust to your preferred slushie consistency.
Blend on high speed until the mixture is smooth, thick, and icy, with a semi-foamy appearance and visible tiny ice crystals.
Pause and scrape down the sides of the blender as needed, then continue blending until the texture feels silky and well combined.
Pour the slushie into glasses, and immediately enjoy the vibrant yellow, icy treat with a spoon or straw for a refreshing summer snack.