Movie titles question?!

Movie titles question?

Hi all! I live in Indonesia and sometimes I don't get what does a movie's title implies.It is because sometimes they use proverbs, idiom or other words I can't understand. So maybe You all guys can help me to describe what this movie's title mean. Thanks in return.
1. Eating Out : Sloppy Second
2. Butterfly Effect (and connections with its content)
3. Any Given Sunday

Some movie titles just don't make sense, on purpose. But most movie titles have some sort of meaning behind them, like for example "The Wizard of Oz" is a movie about this girl, Dorthy, from Kansas that is injured in a tornado, and dreams her and her dog meet others who want to meet the Wizard of Oz for help. The movie title, in this case is based off one of the main characters.

I would think, in my opinion, that "Eating Out: Sloppy Second" may be about a sloppy restaurant.

Butterflies are very graceful, the movie might be about some people places or things that are graceful.

While Sunday's are, religion wise, God's day, or the day that God rested after he created the earth, so humans reat as well. So I think of some Romance movie about how a couple is together on Sunday.

I am unsure of what the movies are about though, but if you have watched them, you could think about what you saw and apply it to the title.