Definition of "highball" in English

noun

1. A cocktail made from a spirit plus soda water etc.

2. (rail transport, US) An all clear or full speed ahead signal.

3. (climbing) A very high bouldering problem, often with a hard landing.

   • 2014, EpicTV.com Austrian all rounder Alex Luger climbs what he describes as a highball boulder problem and what most people would call a solo.

4. Clipping of highball glass, a tall glass tumbler used for serving highballs.

verb

1. To make an estimate which tends toward exaggeration.

   • If we highball the price, it comes out to $240. If we lowball it, it's closer to $200.

2. (US, slang, possibly dated) To move quickly; to hightail.