I don't understand the meaning of these proverbs.
1.cross one's fingers - this is what we do when we want something to come true. I guess it's a little like praying! I've got my fingers crossed that I win the lottery this weekend.
2.one's cup of tea - something you like. Golf really isn't my cup of tea = I don't like golf.
3.full of beans - very animated, happy, chirpy, chipper, enthusiastic, bouncy
4.a piece of cake - very easy. If you're a very good typist, typing 50 words a minute is a piece of cake.
5.drive someone up to the wall - to annoy someone a lot. There's a guy at my office who whistles all the time. He drives me up the wall.
6.a frog in the throat - when you have a very annoying feeling in your throat which makes you cough a lot, or makes it a little difficult to speak.
7.win one's hands down - To win very easily. Roger Federer played an unknown player from Germany yesterday, and he won hands down.
8.crocodile tears - fake tears. Crying or appearing to cry when you are not really upset. We discovered that the man killed his wife himself, so at the funeral he was crying crocodile tears.
Can you explain them, please?
THANKS