(idiomatic, sometimes humorous) A protective helmet, as worn, for example, by a motorcyclist, bicyclist, or soldier in combat. / (dated) The skull.

(idiomatic) A narrative, commentary, etc. which amuses and holds one's attention, but which lacks intellectual depth or importance.

Alternative form of root and branch

A piece of jewelry worn around the ankle; an anklet. / An ankle monitor.

Alternative form of birdbrain

Alternative form of birdbrained

A surname. / An unincorporated community in Huntington County, Indiana, United States. / An unincorporated community in Webster County, Missouri, United States, named after Bracken Creek.

(Cockney rhyming slang) Pissed, drunk.

(historical astronomy) The (approximately) twelve years of Jupiter's orbital period, forming the Chinese zodiac and personified as twelve or sixty gods known as Tai Sui.

(group theory) A group whose elements represent ways to weave some number of strings into braids.