1. Piraguas are shaved ice, in a cone or -more recently- plastic cup, doused liberally with snow cone syrups. There is a wide variety of flavors, mostly tropical in nature. Some of the favorites are strawberry (frambuesa), tamarind, lemon, coconut, vanilla, passion fruit (parcha).
2. Puerto Rican slang used for describing a Tropical Snow Cone.
Yo quiero un piragua de coco, y un de tamarind... how much will that be? Dos pesos? Gracias!