Here are some idioms that you will only here in the UK:
Usually used after a set of simple instructions and has the same meaning as the phrase "and there you have it". It shows that something will be successful:
'To access the site, simply enter your password here and Bob's your uncle..'
When something's very cheap, it is as cheap as chips:
'These shoes are only ten pounds a pair - cheap as chips!'
To be very drunk. To have drunk too much alcohol:
'I don't really remember what happened. I'm sorry to say that I was as drunk as a lord last night.'
When you give someone stick you criticise them:
'My team-mates gave me stick for missing the start of the match.'
When you lose your temper and become very angry, you go spare:
'Mum will go spare when she finds out you broke her vase.'