The term "Cantab" is an abbreviation of "Cantabrigian," which is used primarily to refer to something or someone associated with Cambridge. Specifically, it commonly indicates a person who is a graduate of the University of Cambridge in the United Kingdom. It can also relate to the cities of Cambridge, England, and Cambridge, Massachusetts, United States. The origin of the word comes from the medieval Latin name for Cambridge, "Cantabrigia".
In academic usage, "Cantab" is often used after someone's name and qualifications to signify they have a degree from Cambridge University, such as in "James Cox MA (Cantab)". It can also be applied colloquially to students or graduates of Harvard University in Cambridge, Massachusetts.
Thus, "Cantab" essentially means a Cambridge associate, most commonly a Cambridge University graduate.
