DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Lark \Lark\, v. i. [imp. & p. p. Larked (l[aum]rkt); p. pr. &
      vb. n. Larking.]
      To sport; to frolic. [Colloq.]
      [1913 Webster]