1. [n]  a wild gathering involving excessive drinking and promiscuity
2. [n]  a public act of violence by an unruly mob
3. [n]  a joke that seems extremely funny
4. [n]  a state of disorder involving group violence
5. [v]  engage in boisterous, drunken merry-making; "They were out carousing last night"
6. [v]  take part in a riot; disturb the public peace by engaging in a riot; "Students were rioting everywhere in 1968"

Riot
Billy the Kid, a young outlaw, attempts to steal Riot, a sacred text that contains untold treasures of an ancient kingdom, not to mention half the secrets of the universe. But his attempt is foiled, and as Billy the Kid lies dying, mortally wounded by Axel, the beautiful woman who guards Riot, the book itself strikes a bargain: Billy can have insight into the volume`s secrets as long as he protects Axel for all his days.

more details ...

1. \Ri"ot\, n. [OF. riote, of uncertain origin; cf. OD. revot,
   ravot.]
   1. Wanton or unrestrained behavior; uproar; tumult.
            His headstrong riot hath no curb.     --Shak.
   2. Excessive and exxpensive feasting; wild and loose
      festivity; revelry.
            Venus loveth riot and dispense.       --Chaucer.
            The lamb thy riot dooms to bleed to-day. --Pope.
   3. (Law) The tumultuous disturbance of the public peace by an
      unlawful assembly of three or more persons in the
      execution of some private object.
   {To run riot}, to act wantonly or without restraint.
   

2. \Ri"ot\, v. i. [imp. & p. p. {Rioted}; p. pr. & vb. n.
   {Rioting}.] [OF. rioter; cf. OD. ravotten.]
   1. To engage in riot; to act in an unrestrained or wanton
      manner; to indulge in excess of luxury, feasting, or the
      like; to revel; to run riot; to go to excess.
            Now he exact of all, wastes in delight, Riots in
            pleasure, and neglects the law.       --Daniel.
            No pulse that riots, and no blood that glows.
                                                  --Pope.
   2. (Law) To disturb the peace; to raise an uproar or
      sedition. See {Riot}, n., 3. --Johnson.
   

3. \Ri"ot\, v. t.
   To spend or pass in riot.
         [He] had rioted his life out.            --Tennyson.