[catch] (on|) fire
1
to start burning
- The old barn caught fire and burned to the ground.
- He accidentally spilled gasoline, causing the garage to catch on fire.
- The forest caught fire during the dry season.
- The kitchen caught on fire when the oil in the pan overheated.
- The curtains caught fire from a candle's flame.
2
to quickly gain popularity or go viral
- Videos like this often catch fire within hours.
- Her post caught fire after a celebrity shared it.
- That idea will definitely catch fire once people hear about it.
- The hashtag is already catching fire on Instagram.
- The clip was catching fire just as the creators launched their campaign.