sour grapes
US /ˈsaʊər ɡreɪps/
UK /ˈsaʊər ɡreɪps/

1.
kwaśne winogrona, zazdrość
an attitude in which someone pretends to dislike something because they cannot have it or achieve it
:
•
Her criticism of his new car was just sour grapes because she couldn't afford one herself.
Jej krytyka jego nowego samochodu to tylko kwaśne winogrona, bo sama nie mogła sobie na taki pozwolić.
•
He said he didn't want the promotion anyway, but I think it's just sour grapes.
Powiedział, że i tak nie chciał awansu, ale myślę, że to tylko kwaśne winogrona.