To terrify. The phrase “the horrors” is English: see 1768, 1780; but “give the horrors” is perhaps American.

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1768.  He is coming this way all in the horrors.—Goldsmith, ‘The Good-natured Man.’ (N.E.D.)

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1780.  London is in the horrors.… A spirit of bigotry and fanaticism, mixing with the universal discontents of the nation, has broken out into violences of the most dreadful nature.—J. Adams, ‘Familiar Letters’ (1876), p. 382. (N.E.D.)

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1794.  The Sans-Culottes have given the horrors to all the aristocrats in the West Indies.—Letter from St. Eustatius in The Gazette of the U.S., Phila., Aug. 4.

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