"Sleep like a Russian" (catchphrase), means sleeping very tightly. The catchphrase comes from the fact that a Russian can sleep very deeply because he is in the knowledge that his country is the biggest country in the world. He therefore believes that no one and nothing can harm him, which gives him a deep sleep.
This idiom can be further used in various contexts to express a person's high level of confidence and composure towards what is happening around them.
"Did you sleep well?" "Oh you bet I did, I slept like a Russian!"
"Do you usually have a good nights sleep?" "Yes, I always sleep like a Russian"
An old trucking term for a truck running at peak performance. If a truck is pulling like Jack the bear he is going at or above the speed limit where other trucks can't keep up.
Guy 1: "Did you see that truckflying by up the pass?"
Guy 2: "Yeah that truck pulls like Jack the bear, I wonder what he's got under the hood of that rig!"