A horseshoe moustache, also known as a biker moustache, is a full moustache with vertical extensions grown on the corners of the lips and down the sides of the mouth to the jawline, resembling an upside-down U or a horseshoe. The whiskers grown along the sides of the mouth in the horseshoe are sometimes referred to as "pipes". The moustache is often seen and used as a symbol of masculinity.
The style is popular among sports personalities and entertainers. NFL legend Joe Namath, cowboy actor Sam Elliott, ’70s Hollywood star Elliott Gould, Orange County Choppers' Paul Teutul, Sr. , WWF/E wrestling champion Hulk Hogan, Pink Floyd drummer Nick Mason, Metallica frontman James Hetfield, Glenn Hughes (Leatherman) of the Village People, and Guns N' Roses frontman Axl Rose have all worn iconic examples of horseshoe moustaches.
- "American Mustache Institute – Mustache Styles". Retrieved 2013-06-16.