highball

Meanings

1. A cocktail made from a spirit plus soda water etc.
2. An all clear or full speed ahead signal.
3. A very high bouldering problem, often with a hard landing.
4. Clipping of highball glass, a tall glass tumbler used for serving highballs.

1. To make an estimate which tends toward exaggeration.
2. To move quickly; to hightail.

Etymology

From high + ball, of the same railroad origins as lowball.