Bacchic art refers, in general, to art honouring the god Bacchus

Dionysus

Dionysus was the god of the grape harvest, winemaking and wine, of ritual madness and ecstasy in Greek mythology. His name in Linear B tablets shows he was worshipped from c. 1500—1100 BC by Mycenean Greeks: other traces of Dionysian-type cult have been found in ancient Minoan Crete...

, but in specific to representations, particularly sculpture, of his followers, such as satyrs, centaurs and hermaphrodites  (for this reason, ancient Greek plays

Theatre of Ancient Greece

The theatre of Ancient Greece, or ancient Greek drama, is a theatrical culture that flourished in ancient Greece between c. 550 and c. 220 BC. The city-state of Athens, which became a significant cultural, political and military power during this period, was its centre, where it was...

 are not often referred to as Bacchic, although many were performed in his honour). Bacchic art is often erotic or intentionally shocking, often focusing on seduction or rape. Most of the finest examples date from the Hellenistic period.