boil over — liquid spills while boiling
phrasal verbB1common
rise up and spill over the side of a pan while boiling
Pattern: something boils over
In use
- Keep an eye on the pasta or it'll boil over and make a mess.food
- The milk boiled over and went all over the hob.food
Common mistake
Confusing with 'boil' alone — 'boil over' means it spills.