noun

1. An inexpensive surfboard made of extruded polystyrene foam

   “A young surfer learning on a foamie Surfing: Skills - Training - Techniques”

adjective

1. Full of foam.

   “1715–1720:Tlepolemus, the sun of Hercules, / Led nine swift vessels through the foamy seas — Alexander Pope, The Iliad”

Synonyms: frothy, spumescent