a killing 'frost' [=weather that is so cold that the frost kills plants]
These plants should bloom until the first 'frost' of the season.
I have to 'frost' the birthday cake.
(..) The fuse hss snapped! What's happened? ls it armed? Hang on a second. l'll be right with you. Can you see the detonator, Sir? You've got to cut it, Sir. That frost won't lsst. Stop! Stop! Slow down! Stop! Stop! Slow down! - Go away! - Yes, Sir. - This is making me incredibly angry. (..)1996 The English Patient