1300-50; (noun) Middle Englishfars stuffing < Middle Frenchfarce < Vulgar Latin*farsa, noun use of feminine of Latinfarsus, earlier fartus stuffed, past participle of farcīre to stuff; (v.) Middle Englishfarsen < Old Frenchfarcir < Latinfarcīre
1530, from M.Fr. farce "comic interlude in a mystery play," lit. "stuffing," from O.Fr. farcir "to stuff," from L. farcire, perhaps related to frequens "crowded." The pseudo-L. farsia was applied 13c. in France and England to praise phrases inserted into liturgical formulae (e.g. between kyrie and eleison), then in O.Fr. farce was extended to the impromptu buffoonery among actors that was a feature of religious stage plays.