Officially, “dude” does not refer to an infected hair on an elephant’s butt. This particular definition of dude is primarily propagated as urban legend or myth.
The origin of the term “dude” may be traced back to New York City slang; it originally refers to a man who is extremely concerned with his looks, grooming, and manners. The most popular definition of “dude” is a broad term of address for men, women, and groups. In western American slang, it also refers to a city person who has travelled to a ranch for a vacation.