fire and brimstone
1. noun The misery that one faces in hell. Unrepentant criminals better prepare themselves for fire and brimstone after death.
2. noun Intense speech about the misery that one faces in hell. You're just scaring the kids with all this fire and brimstone.
3. adjective Describing such speech. You're just scaring the kids with all this fire and brimstone talk.
fire and brimstone
the supposed torments of hell. In the Bible, fire and brimstone are the means of divine punishment for the wicked (see, for example, Genesis 19:24 or Revelation 21:8). Brimstone (from the Old English word brynstan meaning ‘burning stone’) is an archaic word for ‘sulphur’ and is now rarely found outside this phrase.