shake in (one's) boots
To tremble with fear. Often used sarcastically. My brother is so strong and scary-looking that people shake in their boots when he threatens them. Ooh, I'm really scared of you! I'm shaking in my boots, you frighten me so!
shake in (one's) shoes
To be very nervous or afraid, often visibly so. That poor kid is shaking in his shoes up there on stage. I may seem confident when I'm leading a training seminar, but I'm really shaking in my shoes most of the time.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.