the act of disappointing or the state of being disappointed
2.
a person, thing, or state of affairs that disappoints
bringdown in American English
(ˈbrɪŋˌdaun)
noun informal
1.
a disappointment or disillusionment; letdown
It was quite a bringdown to find myself running last in the mayoral race
2.
anything, as a cutting remark or critical action, that causes depression or deflates one's ego; a put-down
Word origin
[1940–45; n. use of v. phrase bring down; modeled on letdown and causative of comedown]This word is first recorded in the period 1940–45. Other words that entered Englishat around the same time include: airlift, redline, sealant, snorkel, whiteout