Slapstick comedy is a primarily physical kind of comedy based around pratfalls and mild comic violence -- smacks in the head, pokes in the eyes, people falling down, etc. Though it's a tradition that goes back all the way to the theater of Ancient Greece, it is probably most widely recognized in the comedy of The Three Stooges
, the Keystone Cops and, for a more contemporary example, MTV's Jackass
Also Known As: Physical comedy
With comedy based almost entirely around hitting one another and falling down, The Three Stooges are considered the masters of slapstick.