jilt \jilt\, verb:
1. to reject or cast aside (a lover or sweetheart), especially abruptly or unfeelingly.
noun:
1. a woman who jilts a lover.
But for the sake of some of her relations, I shall give my fair jilt a feigned name.
-- Aphra Behn, "The Fair Jilt," 1688
"...we know very well women scarcely ever jilt men; 'tis the men who jilt us."
-- Thomas Hardy, "Far from the Madding Crowd," 1874
The origin of jilt is uncertain, but it is perhaps from the Middle English gille meaning "lass" or "wench," which was a shortening of the women's name Gillian, a variant of Jill.
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