stay frosty

Etymology
Originally military slang, probably as a reference to, but with extra emphasis because of the need to stay alert in dangerous situations.

Verb

 * 1)  To be alert and ready for action, without letting one's fear or other emotions get in the way.
 * 2) *1986, 'Corporal Hicks', Aliens (movie):  We're all in strung out shape, but stay frosty, and alert
 * 3)  To keep one's cool.
 * 1)  To keep one's cool.
 * 1)  To keep one's cool.
 * 1)  To keep one's cool.
 * 1)  To keep one's cool.
 * 1)  To keep one's cool.