Sorry for being dumb here. But really before joining this site, I had no idea what the word
spoiler means in case of movie discussion. After joining here, I have seen the word like
spoiler alert here in several questions and answers. Also in IMDB, I found this keyword. Several other sites also use this keyword in different way.
So what does the keyword
spoiler mean in case of discussion on movie?
Also here in faq, it is written
Please note that spoilers are allowed here and may be out in the open. What does it mean either?