A vehicle often frequented by the good people of ARRSE.
The Outrage Bus is used when stories, (most of them absolute rubbish) appear about soldiers being wronged in the most ridiculous of circumstances. See here for some details.
The keys for the bus are signed out on such a regular basis that at no stage during the last 3 years has the outrage bus' engine been cold.
See also The Outragemobile used by ARRSERS on manoeuvres.