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Meaning of mindblower

mind•blow•er

Pronunciation: (mīnd'blō"ur), [key]
— n. Slang.
  1. a hallucinogenic drug.
  2. something that astounds, excites, or dismays: The news of the loss of the cargo ships was a real mindblower.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.