When one is drinking a cold drink (daquiri, smoothie, milkshake etc.) and the liquid sits on top and the bottom half has no moisture and is just flavored ice.
Geff: Dude, you take forever to drink your piña colada!
Emilio: IT's not my fault! I got half-cup syndrome!
Emilio: IT's not my fault! I got half-cup syndrome!
by diggy-french April 17, 2010
Get the Half-cup syndromemug.