pie in the sky
US /paɪ ɪn ðə skaɪ/
UK /paɪ ɪn ðə skaɪ/

1.
mrzonki, utopia, złudzenie
an idea or plan that is pleasant to imagine but impossible to achieve
:
•
His dream of becoming a millionaire overnight is just pie in the sky.
Jego marzenie o zostaniu milionerem z dnia na dzień to tylko mrzonki.
•
The politician's promises sounded like pie in the sky to many voters.
Obietnice polityka brzmiały dla wielu wyborców jak mrzonki.