Definitions for "Anticlimax"
A sentence in which the ideas fall, or become less important and striking, at the close; -- the opposite of climax. It produces a ridiculous effect.
Like a climax, an anticlimax is the turning point in a story. However, an anticlimax is always a letdown. It's the point at which you learn the story will not turn out as you expected.
a disappointing decline after ad previous rise; "the anticlimax of a brilliant career"
A gradual or sudden decrease in the importance or impressiveness of what is said.