Don’t show one’s feelings, especially refrain from laughing. For example, The school orchestra played so many wrong notes that I had trouble keeping a straight face. [ Late 1800s ]
- Keep a sharp lookout
see: keep an eye out for
- Keep a weather eye out
Also, keep a weather eye on or open. Be extremely watchful or alert, as in We should keep a weather eye on our competitors in case they start a price war. The precise allusion in this expression is disputed, but presumably it refers to watching for a storm. [ Early 1800s ]
- Keep cool
Also, keep a cool head ; stay cool ; be cool ; (take it cool) . Remain calm and under control, as in Keep cool, they’ll soon show up , or Be cool, the surprise is not spoiled , or You have to keep a cool head in these volatile situations , or Sit tight, […]
noun, Theater. 1. an S -shaped hook for securing doors, windows, etc., or for fastening a batten to a flat.