Add the frozen pineapple chunks and lime juice into the blender.
Secure the lid on the blender, then blend on high speed until the mixture is smooth and slushy, about 30-45 seconds.
Check the texture; it should be thick, icy, and scoopable. If needed, blend a few more seconds to reach desired consistency.
Pour the pineapple slushie into glasses, allowing it to mound slightly for a frosty look.
Optional: garnish with a slice of lime or fresh pineapple for a colorful finishing touch.
Enjoy immediately for the best icy, tropical experience!