1)The action whereby the breasts of a well-endowed person, usually a woman in skimpy attire, finally exceeds her clothes, often in public.
2)When boobs explode out of an item of clothing.
Will: "Oh my God, Emilys' tits just popped out!"

Dave: "Yes, it was a real titsplosion, wasn't it?"
by Duke82 October 29, 2009
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