1. speak up 더 크게 말하다;
to speak in a louder voice so that people can hear you.
Could you speak up a bit? It's very noisy here.
I'll just text message you what I need. (문자를 보내다)
2. I'll pass. 안할래. 사양할래; to decide not to do
How about hitchhiking? I've never done that before.
That sounds dangerous. I'll pass.
3. cost a fortune. 값이 비싸다; to be extremely expensive.
I looked at all the cars that I wanted and they all cost a fortune.
4. keep tabs on 예의주시하다; to watch someone or something carefully
She bought cell phone mainly to keep tabs on me.
5. the last minute 마지막 순간; The latest possible opportunity to do something before the
deadline, due date, etc.
Have you studied for your exam yet?
Not yet, I tend to study at the last minute.