A group of kids who just saw their first uncircumcised penis and didn't know what it was so they just called it a Snuffy. Now it is a very popular term.
Hypothetical alias of an enlisted person in the US Air Force who can't seem to do anything right. Used frequently in Air Force officer training texts and case studies, Airman Snuffy is analogous to the United States Marine Corps' Gomer Pyle.