1. frass - Noun
2. frass - Adjective
(entomology) The droppings or excrement of insect larvae.
The sawdust-like byproduct of wood-boring insects like termites, old-house borers or powderpost beetles.
frass (comparative frasser, superlative frassest) (MLE)
Under the influence of marijuana, stoned.
frass (uncountable)
(informal) artificial turf