Cheers!

This single word, "Cheers!", is certainly the most commonly used phrase here, which makes sense given it's broad range of meaning. Thus far we've compiled the following list of possible meanings of the word cheers:

- Hi
- Bye
- Thanks
- No thanks
- Excuse me
- Sorry!
- It's okay!
- Have a good day
- See you later
- I'll be right back with that
- Nice to meet you
- Nice to meet you too
- Sounds good to me
- No problem
- Take care
- Good food
- Good beer
- Good point

And the most important:
- I don't know what else to say, so I'll just say, "Cheers!"