frog spit

American

[frawg spit, frog] / ˈfrɔg ˌspɪt, ˈfrɒg /

noun

Also frog spittle. any of several filamentous freshwater green algae forming floating masses.
cuckoo-spit.

frog spit British

noun

another name for cuckoo spit
a foamy mass of threadlike green algae floating on ponds

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of frog spit

First recorded in 1815–25

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023