mod. having to do with beer sold from a barrel or keg. : Do you have any imported beers on tap here?
mod. immediately available. : I have just the kind of person you're talking about on tap.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw-Hill Education.
Cite This Source
Idioms & Phrases
Available for immediate use, ready, as in We have two more trumpeters on tap for the parade. This metaphoric expression alludes to a beverage such as beer that is ready to be drawn from a cask. [Mid-1800s]