flapjack tits
/ˈflapˌjak tits/
noun

North American

Breasts that, when a woman is naked, hang or sag down in a way that makes them resemble flapjacks or pancakes. It is especially apparent when she bends over.
With her bra on she looked like she had a huge rack. When she took off the bra I could see she actually had flapjack tits.