Note : An idiom is a fixed expression with a certain meaning.
In a rash moment I said I'd buy my wife a car for her birthday. The trouble was she had set
her heart on a particular colour — white. It had to be white at all costs. I pointed out till
I was blue in the face — almost going out of my mind, that white was a very difficult colour to keep clean.
But she was adamant and so in the end I decided to surrender — to show the white flag, as it were. We looked at dozens of white and off white cars but none seemed to be worth buying.