Highball

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For the drinking vessel, see highball glass.

Highball was the codename of early versions of the bouncing bomb designed by Barnes Wallis during World War II.

Highball is a railroad signal that took the form of a raised ball on a post, meaning "go". Today, few physical highball signals remain, but the term is used as a command by US train crews, synonymously with the original meaning.

Highball - (v.) trucker slang for making good time, speeding, or moving fast in general. Comes from the gearshift grip (usually a ball) being in the top gear position. Hence High-Ball. to highball, highballing

Highball is a bouldering term describing an unroped bouldering problem high enough to present the threat of death or serious injury should the climber fall.