a bun in the oven
when a girl is pregnant, and it’s like a baby is cooking in her, and she’s not happy about it
My friend is a bun in the oven. She’s been eating pizza like it’s her last meal.
She texted me, 'I’m a bun in the oven, and I’m not backing down.'
That lady is a bun in the oven. She’s got a baby in there, and it’s probably yelling.