have a bun in the oven

Found in Anh - Anh (Wordnet)

Definition Verb (idiomatic, informal) : To be pregnant; to be expecting a baby. This is a humorous and informal expression that compares pregnancy to having bread baking in an oven. Usage This phrase is used exclusively to describe a woman who is pregnant. It is a light-hearted, colloquial idiom. It is generally considered informal and should be used in casual contexts among friends and family,...