Idioms with the word "out"

How can you answers this following sentence: "I have some big news, but I'm not sure if I should tell you"

What do we say when you officially leave some place - such as a hotel, or a hospital?

Another way of saying "watch out" is...

How would you say "ah para, sai daí cara hahahaha" in English? (

If you note your friend is in a bad relationship with someone, how can you suggest he our she must quit?

When you're felling unfamiliar and awkward in some group or situation, you are...

What idiom do you use if a car is coming towards a friend who is not paying attention?

If your friend is willing to tell you a secret, but he or she is still a little afraid of telling it, so you get anxious. What can you say?