Place a barbell in your snatch overhead position and lock it in forcefully. Keeping it as stable as possible, take the prescribed number of steps, stop and stabilize, and perform the prescribed number of overhead squats. Repeat for the prescribed number of times.
 
The goal is keeping the upper back, shoulders, arms and bar as motionless as possible with continuous active effort to stay tight.
 
Purpose
The snatch-grip overhead carry + squat is a way to improve overhead stability for the snatch, as well as condition the hands and wrists in particular for overhead work.
 
Programming
4-8 steps + 1-3 squats 2-4 times per set are generally appropriate for 2-5 sets.