be green around the gills
US /bi ɡriːn əˈraʊnd ðə ɡɪlz/
UK /bi ɡriːn əˈraʊnd ðə ɡɪlz/
1.
to look ill or nauseous
:
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After the roller coaster ride, he was green around the gills.
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She looked a bit green around the gills after eating that questionable seafood.