on tap

idiomPart oftap

on tap — idiom

1. 1) served directly from a barrel through a tap (of beer or cider); 2) available

1.idiom
Definition

1) served directly from a barrel through a tap (of beer or cider); 2) available for immediate use whenever needed (figurative, of information, services, expertise)

Example

This pub keeps three different stouts on tap all year round.

A good personal assistant keeps all your appointments and contacts on tap.