Down in the Mouth(英) / down in the Dumps(美) 郁郁不乐,垂头丧气

W：I feel I should apologize to everyone for my behavior over the last six months. I have, as you know, been somewhat down in the mouth.

M：There’s an understatement. There are dead people on better form.

W：But I just wish to make it clear I’ve turned a corner and henceforward intend to be impressively happy.