Knickers are underwear worn by women below the waist. A pair of knickers, clean knickers, don't get your knickers in a twist.
It is British; America says panties or underwear. It is plural only, like trousers. Don't get your knickers in a twist means stop panicking, and knickers on its own is a mild British exclamation of dismissal, roughly meaning nonsense.
1nounknickersUnderwear worn by women below the waist.
“She packed a toothbrush and some clean knickers for the weekend.”
knickers is a garment.
Also accepted in games: panties
A clipping of knickerbockers, loose breeches named after a fictional Dutch family in Washington Irving's book.
a clipping of knickerbockers.
Etymology from Wiktionary, CC BY-SA