have your cake and eat it (too)
US /hæv jʊər keɪk ænd iːt ɪt tuː/
UK /hæv jʊər keɪk ænd iːt ɪt tuː/

1.
avere la botte piena e la moglie ubriaca, volere tutto
to want or try to do two things that are impossible to do at the same time
:
•
You can't have your cake and eat it too; you need to choose between your career and your hobby.
Non puoi avere la botte piena e la moglie ubriaca; devi scegliere tra la tua carriera e il tuo hobby.
•
She wants to work full-time and also travel the world, but she can't have her cake and eat it too.
Vuole lavorare a tempo pieno e anche viaggiare per il mondo, ma non può avere la botte piena e la moglie ubriaca.