A riot control agent is a non-lethal chemical used to disperse a riot. It can rapidly produce sensory irritation or disabling physical effects which disappear following termination of exposure. Examples include tear gases such as CS gas and CN gas as well as pepper spray.
... more specific uses of the term, the most common include:
1. A supporter of King Charles I of England during the English Civil War.
2. In the UK, a believer in the ...