horseplay

from WordNet (r) 3.0 (2006)

horseplay
    n 1: rowdy or boisterous play

from The Collaborative International Dictionary of English v.0.48

Horseplay \Horse"play`\, n.
   Rude, boisterous play.
   [1913 Webster]

         Too much given to horseplay in his raillery. --Dryden.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

33 Moby Thesaurus words for "horseplay":
      badness, banter, buffoonery, clownishness, discourtesy, disorder,
      disorderliness, disorderly conduct, disruption, disruptiveness,
      foolery, fooling, frowned-upon behavior, harlequinade, hooliganism,
      impropriety, misbehavior, misconduct, misdemeanor, misdoing,
      monkeyshines, naughtiness, nonsanctioned behavior, roughhouse,
      rowdiness, rowdyism, ruffianism, shenanigans, tomfoolery,
      vandalism, venial sin, vice, wrongdoing