Fantastic, wonderful, or extraordinarily good; an enthusiastic expression of approval (often from Spanish or Italian influence).
From Spanish/Italian fantastico meaning 'fantastic' or 'wonderful.' English borrowed this as an emphatic variant of fantastic, especially in exclamatory contexts or borrowed from Romance language speakers.
The word 'fantastico' took on English life when Italian and Spanish influence peaked in English—it still carries that enthusiastic, continental flavor, which is why it sounds more vibrant than plain 'fantastic.'
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