cardinal sin

The cardinal sin for a parent is to give a child the chance to "mess up."

That's a cardinal sin in jazz, which demands the original voice.

You'd just be committing the most cardinal sin in any hospital.

In short order he ran down a list of cardinal sins committed by current art critics.

I knew it would probably be a cardinal sin in your eyes.

And they were preventing him from getting on with his book; that in itself was a cardinal sin.

Also, eating is not likely to be viewed as a cardinal sin.

There are few cardinal sins in boxing, but refusing to fight is one of them.

It's a cardinal sin if we don't do anything about it.

From the outside it doesn't look like I've committed a cardinal sin.