downer
noun /ˈdaʊnə(r)/
/ˈdaʊnər/
(informal)- [usually plural] a drug, especially a barbiturate, that relaxes you or makes you want to sleep compare upperTopics Social issuesc2
- an experience that makes you feel sad or depressed
- Not getting the promotion was a real downer.
- on a downer He's really on a downer (= very depressed).