US /hæv ə bʌn ɪn ði ˈʌvən/
・UK /hæv ə bʌn ɪn ðə ˈʌvn/
person is pregnant, so they have a bun in the oven. The oven would be the uterus, I
So, they have a bun in the oven.
So you say: "Oh, you know, I think she might have a bun in the oven."
So you say: "Oh, you know, I think she might have a bun in the oven".