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Meaning of mind-blowing

mind-blow•ing

Pronunciation: (mīnd'blō"ing), [key]
— adj. Slang.
  1. overwhelming; astounding: Spending a week in the jungle was a mind-blowing experience.
  2. producing a hallucinogenic effect: a mind-blowing drug.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.