The Collaborative International Dictionary of English v.0.48:

Wanton \Wan"ton\, v. i. [imp. & p. p. Wantoned; p. pr. & vb.
   n. Wantoning.]
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   1. To rove and ramble without restraint, rule, or limit; to
      revel; to play loosely; to frolic.
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            Nature here wantoned as in her prime. --Milton.
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            How merrily we would sally into the fields, and
            strip under the first warmth of the sun, and wanton
            like young dace in the streams!       --Lamb.
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   2. To sport in lewdness; to play the wanton; to play
      lasciviously.
      [1913 Webster]