Expression used when excitement ensues.

Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy

an expression used when unusual extreme happiness occurs inside the body

A hooray (also Hooray Benry) is in British English, an upper-class male, probably university-age or a bit older, who thinks it's amusing to be loud, and rude to social 'inferiors',and the locals, especially waitresses. (In 'Trainspotting', the book not the film, a waitress hets her revenge by putting her tampon in a Hooray's soup before she serves it to him.) They wear striped shirts and try to talk a bit deeper than normal people.

Strine (Australian) for Goodbye. Appears to be closely related to Hoo Roo, another Aussie/Kiwi (?) version of Goodbye.

An exultation of joy, similar to hooray but on a wholly different scale.

A word you say when you totally stay numb under when it happens.