English #1 "Idioms"

it was a piece of cake - it was really easy.

I'm over the moon! - I'm so happy!

i was like a fish out of water - i didn't know what i was doing

that was a close shave! - i nearly have an accident/ made mistake, but i didn't

it drives me nuts! -  it makes me so angry!

hold your horses! - wait a minute!

I have to start from scratch - i have to begin again

you're pulling my leg! - you're joking

source :  http://www.astro.com.my/ohmyenglish/