last-minute paging-cancel 

Refers to the insanely-frustrating act of asking an employee over the PA system to come and assist with something, only to then say, "never mind" a long while afterwards, when said frazzled employee has hastily "dropped everything" and speed-walked almost all the way up to the area where he was asked to present himself.

The last-minute paging-cancel is especially infuriating/draining if the responding employee has had to go through a lot of difficult preparation before heading to his requested locale, such as cleansing his extremely-soiled hands, changing into cleaner/neater attire, setting down a huge armload of items, powering off a complicated piece of equipment, etc.

last-minute paging-cancel by QuacksO May 10, 2019