The term 'Beatles Jacket Style' refers to the Nehru jacket, a five-letter word. The Nehru jacket is a hip-length tailored coat with a mandarin collar, which was popularized by Jawaharlal Nehru, the first Prime Minister of India. It was adopted by The Beatles in the 1960s and has since become associated with the band. The style has been embraced by many other musicians and celebrities, and is still popular today.