(idiomatic, Britain, Ireland, humorous, informal) To become overwrought or unnecessarily upset over a trivial matter.

(slang, Britain) plastic bags snagged in trees and bushes.

(idiomatic, humorous, informal) Synonym of get one's knickers in a twist

(dated, dialect, UK, US) A small ball of clay, baked hard and oiled, used as a marble in games.

(used attributively as a modifier) Of or relating to knickers. / knickerbockers

Not wearing any knickers; without underwear

A drawer, in a chest of drawers or dressing table, in which a woman keeps her underclothes

(idiomatic, slang, chiefly imperative) To stay calm; to not get flustered or angry.

plural of knickpoint

(geomorphology) Part of a river or channel where there is a sharp change in slope, such as a waterfall or lake.