have a bun in the oven
怀孕
口语·委婉说怀孕
英文释义
to be pregnant
例句
She's been feeling tired lately; I think she has a bun in the oven.
典故来源
源自20世纪中期美国俚语，将怀孕比作烤箱里烤着面包，形象幽默。