/kooh"kooh spit', kook"ooh-/ , n.
1. Also called frog spit . a frothy secretion found on plants, exuded by the young of certain insects, as the froghoppers, and serving as a protective covering.
2. an insect that produces this secretion.
[ 1350-1400; ME cokkowespitle cuckoopint; so called from the spitlike secretion found on the plant and thought to be left by the bird ]