Knickerbocker: also spelled Knikkerbakker, Knickerbakker, Knickerbacker, is a surname that dates back to the early settlers of New Netherland that was popularized by Washington Irving in 1809 when he published his satirical A History of New York under the pseudonym "Diedrich Knickerbocker". It was also a term for Manhattan's aristocracy "in the early days" and eventually became a general term when referring to any New Yorker, although both are generally out of use in today's vernacular.
Today it may refer to:
Knickerbockers:
are men's or boys' breeches or baggy-kneed trousers particularly popular in the early twentieth century USA. Golfers' plus twos and plus fours wear breeches of this type. Before World War II, skiers often wore knickerbockers too, usually ankle-length.
Until after World War I, in many anglophone countries, boys customarily wore short pants in summer and knickerbockers or "knickers" (or "knee pants") in winter. At the onset of puberty, they graduated to long trousers. In that era, the transition to "long pants" was a major rite of passage. See, for example, the classic song Blues in the Night by Johnny Mercer: "My mammy done told me, when I was in knee-pants, my mammy done told me, son...".
Baseball players wear a stylized form of knickerbockers, although the pants have become less baggy in recent decades and some modern ballplayers opt to pull the trousers close to the ankles. The white trousers worn by American football officials are knickerbockers, and while they have become less baggy, they are still worn ending shortly below the knee. In recent years, the NFL has equipped its officials with long trousers rather than knickers in cold weather.