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burst bubble

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burst someone's bubble

Fig. to destroy someone's illusion or delusion; to destroy someone's fantasy. I hate to burst your bubble, but Columbus did not discover Canada. Even if you think I am being foolish, please don't burst my bubble.

See also: bubble, burst

burst somebody's bubble

also burst the bubble of somebody

to tell someone unexpected bad news I don't want to burst her bubble by telling her we won't have a vacation this summer. He tries to burst the bubble of anyone who believes population growth is not a problem.

See also: bubble, burst