Etymology

jill

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Today it means: A young woman; a sweetheart; like the variant spelling Gill it was also associated with various assertive uses of the term flirt, as in flurt-gills (used by William Shakespeare for a 'woman of light or loose behavior'). Full definition →

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jill · verb, noun1

From the female name Jill. * (to masturbate): By analogy with jack (off). See Jack (“male name”). * (gill): Paired with jack (from the male name Jack) as terms for alcohol measurements. * (pelvic protector): By analogy with jock, Jock being a male name.

Jill · proper noun, noun2

A variant of Gill, diminutive of Gillian, a medieval form of Juliana, ultimately from Latin.

Etymology from Wiktionary, CC BY-SA 4.0.