Why are the RAF reg called rock apes?

The term "rock apes" is a colloquial nickname for members of the Royal Air Force Regiment, often attributed to their role in providing ground defense and their rugged, tough demeanor. The origins of the nickname may stem from the regiment's history, particularly during deployments in challenging environments like the jungles of Malaysia, where they were likened to primates for their adaptability and resilience. Additionally, the term may reflect a sense of camaraderie and humor within the military culture.