1. kick off
其实kick off源自于足球，就是开球，发球的意思。
引申为“开始做某事”的意思
kick-off meeting，kick-off party
Candidates kick off their campaigns with a speech.
Students kick-off the semester with a party!
2.up someone's sleeve
指某人的秘密
People dislike those who often have something up their sleeve.
The wife has something up her sleeve for his birthday party.
3. sideline
靠边；副业
John is a teacher but sidelines as a pianist in a band.
Many Americans have one or even two sideline occupations.
4. what's up
This phrase is a casual expression and is normally used when you're talking to friends, family, or colleagues.
You would not want to use it in a formal or business situation.
"What's up?" is a greeting. It's a different way of saying "What's happening?"
hello, ask how things are going,
how the person is feeling
5. I'm a Jack-of-all-trades
A: So what do you do for a living?
B: I'm a handywoman. I fix and replace just about anything, from computers to showers drains.
I guess you could say I'm a Jack-of-all-trades.
"Jack of all trades, master of none,"
it was used to describe people who learned how to do a lot of different things,
but, they weren't able to focus on doing one thing correctly.