The Curious:
It is only worth forgetting the fork, as the boring lunch absorption of food from the "brake", turns into a fascinating arcade...
>Somebody else besides me thinks that this word is still not "brake", but "thermosok"? Thermos with food?

The brake is a mining breakfast, food that is taken with you to the mine. As a rule, miners eat the brake immediately upon arrival at work. It is not common to eat brakes in a hurry, usually this process occurs calmly and relentlessly, under conversations. Origin is completely unknown. The most logical explanation: "brake" - from the word "brake", to take a break in the work for food. Now this word has spread widely in the out-of-the-counter environment.