English edit

Etymology edit

be +‎ cool

Interjection edit

be cool

  1. (imperative) Used to implore someone to not reveal illegal or improper activity.
    • 2016, Erin Udell, “Could CSU's Chase McNary be the next Bachelor?”, in The Coloradoan:
      That's why I scoured our newsroom for red yarn, watched an episode of "The Bachelorette" during work (shhh, be cool) and tacked pictures of reality TV stars alongside a scrap of notebook paper...