Shake in your shoes
Definition 1 of 1
Pro Tip 1/3Colloquial Use
Used more in casual conversation than formal or written English. 
I was shaking in my shoes before the roller coaster started.
Pro Tip 2/3Exaggeration
Often used to exaggerate fear for effect, not always literal shaking. 
He makes me shake in my shoes when he's angry, even if I'm not really trembling.
Pro Tip 3/3Figurative Language
A metaphor for feeling very afraid, without actual movement. 
The haunted house story left us shaking in our shoes.