From Longman Dictionary of Contemporary Englishanticlimaxan‧ti‧cli‧max /ˌæntɪˈklaɪmæks/ noun [countable, uncountable] DISAPPOINTEDa situation or event that does not seem exciting because it happens after something that was much better Going back to work after a month travelling in China was bound to be an anticlimax.
Examples from the Corpus
anticlimax• Having looked forward with anticipation to the Bölkow, I wondered whether I might find it an anticlimax.• Within a few months she would solo, in a flight that was a bit of an anticlimax.• It turned into something of an anticlimax.• After all the hype, the actual concert was something of an anticlimax.• She tried to dismiss the odd feeling of anticlimax she was experiencing.• There was a vague sense of anticlimax mingled with her vast feeling of freedom. 