What is what does stay frosty mean?

"Stay frosty" is an idiomatic expression often used as a military slang to command someone to stay alert, vigilant, cool-headed, and aware of any potential danger or threat. It originated from the military training that soldiers receive in icy cold conditions when they were instructed to remain calm and composed while being exposed to freezing temperatures. The phrase has since been adopted into everyday language and can be used in a variety of situations, whether it be sports, work, or everyday life when someone needs to remain focused and ready for action.