A knicker nicker nicked a pair of knickers off the clothesline.
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knickerbockers
Country club men had reinstated the knicker, adding four inches in length […]1983, David Lanier Lewis, Laurence Goldstein, The Automobile and American Culture, page 58:
A sock worn in the regulation fashion, under the knicker, looks neatest and permits the proper full flare of the knicker.1925, The Clothier and Furnisher, volume 106, page 79: