my ass!

US /maɪ æs/
UK /maɪ æs/
"my ass!" picture
1.

meu rabo, nem a pau, que nada

an exclamation used to express strong disagreement, disbelief, or contempt

:
He said he'd help, my ass!
Ele disse que ia ajudar, meu rabo!
You think you're smart? My ass!
Você se acha inteligente? Meu rabo!