The term 'CAN IN CANTERBURY' can be broken down into three separate words: TIN, GAOL, and LOO. TIN is a metal element that is commonly used to make cans, which are containers used to store food and other items. GAOL is an old-fashioned word for jail, which is a place where people are held as punishment for breaking the law. Finally, LOO is a British slang term for a toilet or restroom. Together, these three words form the phrase 'Can in Canterbury, ' which refers to the idea of being confined or restricted in a certain area.