Top Definition
a cross between explode and boiling over, where something expands out of it's container in a more gradual way than an explosion, but equally uncontrollable. For example milk boiling over, or a mixture of bicarb of soda and vinegar.
That volcano is about to oversplode

Look! If I blow through this straw into my glass of milk I can make the milk oversplode!
by Joe's Mum January 22, 2011
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