English idioms a damp squib

A great expression for those wanting to learn British English. It means that something is a bit of an anti-climax, it's disappointing. Youve been very excited for something to happen but when it does, it was boring and not what you expected in a negative way

I had been looking forward to the party for so long but when I got there nobody showed up and it was so boring. It was such a damp squib