One of the 3 'Unforgivable Curses' in Harry Potter by J.K. Rowling.
The Imperious Curse is used to take full control of the body of another. As with Avada Kedavra use of this curse will have you placed in the Wizard Prison 'Azkaban'
"You will do exactly as I wish....IMPERIO!", The young wizards eyes glazed over and he seemed a million miles away, yet aware of the need to follow and external force.
The right of all bosses to hijack the conversations of subordinates. Said subordinates then must just awkwardly stand there while the boss talks to someone else with their back to you pretending you don't exist.
Dave: Then we can do the load testing and...
Boss: IMPERIOUS INTERRUPTUS!
*Dave stands there awkwardly*
Boss: Dave, stand there awkwardly while I talk to Pete as if you don't exist.