turn/go to mush
From Longman Dictionary of Contemporary Englishturn/go to mushturn/go to mushif your brains, heart etc turn to mush, you cannot think clearly or sensibly If you watch too much TV, your brains will turn to mush. → mushExamples from the Corpusturn/go to mush• All this quickness of mind, all her decisiveness had turned to mush when Mac came on the scene.