垂頭喪氣
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.
中英俚語俗語來源:唐書:“失勢者垂頭喪氣。”
同義詞:沒精打采 With the wind taken out of one's sails.
反義詞:趾高氣揚 Ride the high horse.