have a bun in the oven

US /hæv ə bʌn ɪn ðə ˈʌvən/
UK /hæv ə bʌn ɪn ðə ˈʌvən/
"have a bun in the oven" picture
1.

estar grávida, estar de barriga

to be pregnant

:
My sister just announced she has a bun in the oven!
Minha irmã acabou de anunciar que está grávida!
They're keeping it a secret, but I think she has a bun in the oven.
Eles estão mantendo segredo, mas acho que ela está grávida.