down in the dumps
US /daʊn ɪn ðə dʌmps/
UK /daʊn ɪn ðə dʌmps/

1.
情緒低落, 沮喪, 鬱悶
feeling unhappy or depressed
:
•
She's been down in the dumps ever since her cat ran away.
自從她的貓跑掉後,她一直情緒低落。
•
Don't be so down in the dumps; things will get better.
別這麼垂頭喪氣;事情會好起來的。