垂头丧气
Hang one's head.
Down in the mouth (dumps).
With one's tail between one's legs.
Look crestfallen.
eg:Robert hangs his head down because he lost in the competition.
中英俚语俗语来源:唐书:“失势者垂头丧气。”
同义词:没精打采 With the wind taken out of one's sails.
反义词:趾高气扬 Ride the high horse.