Meaning of the word "Green around the gills" in English

What does "Green around the gills" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

Green around the gills

US /ɡriːn əˈraʊnd ðə ɡɪlz/
UK /ɡriːn əˈraʊnd ðə ɡɪlz/

Idiom

looking ill or nauseated

Example:
After the roller coaster ride, he was looking a bit green around the gills.
She felt green around the gills after eating too much seafood.