shake in your shoes

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.
See also: shake, shoe
Farlex Dictionary of Idioms.

shake (or quake) in your shoes (or boots)

tremble with apprehension.
See also: shake, shoe
Farlex Partner Idioms Dictionary
See also:
  • shake in (one's) shoes
  • (one's) knees are shaking
  • be shaking in (one's) shoes
  • be shaking in (one's) boots
  • put a brave face on (something)
  • put a brave face on something
  • dead-end kid
  • your knees are knocking
  • your/somebody's knees are knocking
  • (one's) knees are knocking