so

1. Used before any other word to describe it as more or larger. [ED. This use of so may already be in some unabridged dictionaries.]

2. To not care about what someone else is saying or pointing out to you.

1. I am so tired.

2: And she was like... So?

2) Word added for emphasis of whatever follows it; it's not just for adjectives anymore.

You are so lying to me right now - I can tell by the look on your face.