take care, have a good one

just act cool, relax and take care of yourself

To chill or act real calm and not worry

be cool, dont stress, and relax

laid back, not stressed

The thing your teacher says before giving you the hardest test of your life. If your teacher says this, you must run from it. A scientific study conducted by MIT confirms that the average test score when a teacher says this is 49%. This phrase is often followed up with stuff like "I am ashamed to give you this test".

When your gas gauge points to the E.