Real Dictionary

erupt
verb: If violence or fighting erupts, it suddenly begins or gets worse in an unexpected, violent way.
verb: If your skin erupts, sores or spots suddenly appear there.
verb: When a volcano erupts, it throws out a lot of hot, melted rock called lava, as well as ash and steam.
verb: When people in a place suddenly become angry or violent, you can say that they erupt or that the place erupts.
verb: You say that someone erupts when they suddenly have a change in mood, usually becoming quite noisy.

erupt in American English
to burst forth or out, as from some restraint
intransitive verb: to burst forth
transitive verb: to release violently; burst forth with

erupt in British English
verb: to eject (steam, water, and volcanic material such as lava and ash) violently or (of volcanic material, etc) to be so ejected