The Collaborative International Dictionary of English v.0.48:

Goliard \Gol"iard\ (g[=o]l"y[~e]rd), n. [From OF. goliart
   glutton, buffoon, riotous student, Goliard, LL. goliardus,
   prob. fr. L. gula throat. Cf. Gules.]
   A buffoon in the Middle Ages, who attended rich men's tables
   to make sport for the guests by ribald stories and songs.
   [1913 Webster]

WordNet (r) 3.0 (2006):

goliard
    n 1: a wandering scholar in medieval Europe; famed for
         intemperance and riotous behavior and the composition of
         satirical and ribald Latin songs