The term 'Guy in a Pub' can be summarized as a CHAP, which is an acronym for a Licensed Convenience and Grocery Store Manager. This job title is used in the United Kingdom and Ireland to refer to someone who is responsible for managing a pub or bar. The CHAP is responsible for ensuring that the pub or bar is properly stocked with drinks and food, as well as providing customer service and maintaining the premises. They are also responsible for ensuring that all legal requirements are met, such as obtaining licenses and permits.