shake in one's shoes
shake in one's boots
quake in one's boots
quake in one's shoes

Well, I bet that's got the capitalists quaking in their boots!

Whoever her opposite number ends up being must be quaking in their boots.

Yeah that should have them quaking in their boots.

So why, without the slightest concrete evidence of danger, am I now quaking in my boots?

On the other hand, I was quaking in my boots for a week.

Now if she had that quality, I might have quaked in my boots.

Obviously the occupy movement doesn't have anyone quaking in their boots.

Speaking of cold feet, do steep trails still have you quaking in your boots?

"But I'm not quaking in my boots, if that's what you're asking."

The music industry has good reason to be quaking in its boots.