Expression - Flat Out Like A Lizard Drinking

We're flat out like a lizard drinking trying to meet our deadline.
We’re flat out like a lizard trying to meet our deadline.
We’re flat out trying to meet our deadline.

That bloke’s been flat out like a lizard drinking painting his house.
That bloke’s been painting his house flat out like a lizard drinking.

I’ve been working all day flat out like a lizard drinking.
I’ve been flat out like a lizard drinking working all day.

Exercise:

I’m flat out like a lizard drinking.
You’re flat out like a lizard drinking.
He’s flat out like a lizard drinking.
She’s flat out like a lizard drinking.
We’re flat out like a lizard drinking.
They’re flat out like a lizard drinking.

I’ve been flat out like a lizard drinking.
You’ve been flat out like a lizard drinking.
He’s been flat out like a lizard drinking.
She’s been flat out like a lizard drinking.
We’ve been flat out like a lizard drinking.
They’ve been flat out like a lizard drinking.