noun
mommy brain; mummy brain; mental dullness in new mothers
Informal term for the forgetfulness, brain fog, or mental sluggishness some new mothers experience, often attributed to hormonal changes, sleep deprivation, and the demands of caring for a baby.
産後はマミーブレインで、物の名前がすぐに出てこない。
After giving birth, I have mommy brain and can't recall the names of things right away.
マミーブレインのせいで、鍵を冷蔵庫に入れてしまった。
Because of mommy brain, I accidentally put my keys in the fridge.