On the double - in a flash

Example

That kid snatched the old lady bag on the double(in a flash)

To live somewhere in the back of beyond - in the middle of nowhere

Example

Gianni left the city a few years ago, now he lives somewhere in the back of beyond in the mountain

To a lesser extent (degree)

Example

Consequences of eurozone crisis to hit Latvia to a lesser extent

To be cheeky - to have the cheek

Example

Politicians have the cheek to lie about issues of global importance

Blow smoke

Example
It's good to know which ones have real web traffic and which one is just blowing smoke

To make a blooper

Example
I  had several sincere readers inform me that i made a blooper as the word i should have used was "altitude" and not "attitude."

I keep what i say

Example

I keep what I say ..."With these words, yesterday Vincente's voice surprised me when i answered the phone

A little bird told me

Example

A little bird told me that you are dating with Sandra

Suit yourself

Example

I don’t want to join the party. Suit yourself!

Waste one's breath

Example
He knew that it would be worse than useless to waste his breath calling for help from that dizzy height

Take something with a grain (pinch) of salt

Example

Of course, everything you read on these newspaper should be taken with a grain of salt

Like a fish out of water

Example

I want to go away, I feel like a fish out of water

Beyond the wildest dreams

Example
Trust me, this business can make a profit beyond the wildest dreams

Walk in

Example

The door was left ajar so I walked in

A host of

Example

We read works by Twain, Kipling, Poe, and a host of lesser writers