downer
US /ˈdaʊ.nɚ/
UK /ˈdaʊ.nɚ/

1.
penyebab kesedihan, hal yang menyedihkan
a person or thing that causes one to feel depressed or unhappy
:
•
The bad news was a real downer.
Berita buruk itu benar-benar penyebab kesedihan.
•
Don't be such a downer, let's try to be positive.
Jangan jadi penyebab kesedihan begitu, mari kita coba bersikap positif.