A fingerstache is a stylized version of a mustache which is drawn on the forefinger, allowing the owner of the fingerstache to position said finger above his or her upper lip for humorous effect. One may also hear fingerstaches referred to as finger mustaches, depending on the region of the world in which one is in.

While people have been drawing silly mustaches and other things on their fingers for quite some time, the popularization of the fingerstache is often traced to an Ohio tattoo artist, who started tattooing mustaches on the fingers of friends in 2003. His tattoos were originally designed as jokes, and because the skin on the fingers is less than ideal for tattooing, they were also essentially temporary, typically wearing away within weeks or months. Thanks to the ease of sharing pictures on the Internet, the fingerstache started traveling worldwide, and it became a fad.

Fingerstache aficionados can share pictures on social networking sites and sites specifically designed as an homage to the fingerstache, and some attend tongue-in-cheek conferences and fingerstache competitions to meet up with fellow fans. Some sites even offer fingerstache templates for the uninspired. While the fingerstache is largely silly, it can serve as a point of connection and icebreaker for strangers, as something about the sight of a grown adult showing off a fingerstache is quite amusing.

Some fingerstache purists insist that the only true form of the fingerstache is as a tattoo, but it is of course possible to create a fingerstache with pens or markers. For people who are fans of frequently changing their fingerstache style, pens are definitely the way to go, as the mustache can be updated on the fly. Penned fingerstaches are also convenient for the younger generation, and for people who want to be able to wash their hands off after a night of fingerstaching so that they can look respectable in the morning.

As a general rule, creating a fingerstache is quite easy, as all you need is a marker and a finger, or a tattoo artist and a finger, should one choose to go with a semi-permanent fingerstache. Most people try to create the most ludicrous, elaborate, and silly mustaches possible, with complex handlebars, twirls, and other ornaments being crucial to the design of a good fingerstache. Some people find that it helps to draw fingerstaches as a group, throwing a fingerstache party of sorts, which allows people to inspire each other with their designs.