They were hyping the movie so much before its release, but it turned out disappointing.

hyping 是动词 hype 的现在分词形式。hype 的意思是"大肆宣传、炒作"，通常指通过夸张或过度宣传来引起公众关注。这个词常带有负面含义，暗示宣传内容可能言过其实。