In Greek mythology, satyrs (in Greek, Σάτυροι — Sátyroi) are a troop of male companions of Pan and Dionysus— "satyresses" were a late invention of poets— that roamed the woods and mountains. In mythology they are often associated with ADULT CONTENT and vase-painters often portrayed them with uncontrollable ADULT CONTENT.

In Roman mythology, fauns are place-spirits (genii) of untamed woodland. Romans connected their fauns with the Greek satyrs, wild and orgiastic drunken followers of Bacchus (Greek Dionysus). However, fauns and satyrs were originally quite different creatures. Both have horns and both resemble goats below the waist, humans above; but originally satyrs had human feet, fauns goatlike hooves. The Romans also had a god named Faunus and goddess Bona Dea, who, like the fauns, were goat-people.

Described as roguish but faint-hearted folk — subversive and dangerous, yet shy and cowardly. As Dionysiac creatures they are lovers of wine and women, and are ready for every physical pleasure. They roam to the music of pipes (auloi), cymbals, castanets, and bagpipes, and love to dance with the nymphs (with whom they are obsessed, and whom they often pursue), and have a special form of dance called sikinnis. Because of their love of wine, they are often represented holding winecups, and appear often in the decorations on winecups.

Some satyrs are depicted as old. On painted vases and other Greek art, satyrs are represented in the three stages of a man's life: mature satyrs are bearded, and are shown as fat and balding, both a humiliating and unbecoming disfigurement in Greek culture.

Their chief was called Silenus, a minor deity associated (like Hermes and Priapus) with fertility. These characters can be found in the only remaining satyr play Cyclops by Euripedes and the fragments of Sophocles' The Tracking Satyrs (Ichneutae). The satyr play was a lighthearted follow-up attached to the end of each trilogy of tragedies in Athenian festivals honoring Dionysus. These plays would take a lighthearted approach to the heavier subject matter of the tragedies in the series, featuring heroes speaking in tragic iambic verse and taking their situation seriously as to the flippant, irreverent and obscene remarks and antics of the satyrs. The groundbreaking tragic playwright Aeschylus is said to have been especially loved for his satyr plays, but none of them has survived.

Attic painted vases depict mature satyrs as being strongly built with flat noses, large pointed ears, long curly hair, and full beards, with wreaths of vine or ivy circling their balding heads. Satyrs often carry the thyrsus: the rod of Dionysus tipped with a pine cone.

Satyrs acquired their goat-like aspect through later Roman conflation with Faunus, a carefree Italic nature spirit of similar temperament. Hence satyrs are most commonly described in Latin literature as having the upper half of a man and the lower half of a goat, with a goat's tail in place of the Greek tradition of horse-tailed satyrs. Mature satyrs are often depicted in Roman art with goat's horns, while juveniles are often shown with bony nubs on their foreheads.