Definitions
1.nounA cocktail made from a spirit plus soda water etc.
2.nounAn all clear or full speed ahead signal.
3.nounA very high bouldering problem, often with a hard landing.
4.verbTo 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."
5.verb(possibly obsolete) To move quickly; to hightail.