wanton

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Lascivious or promiscuous. Used especially of women.
• adjective Exciting or expressing sexual desire.
• adjective Marked by unprovoked, gratuitous maliciousness; capricious and unjust.
• adjective Unrestrainedly excessive.
• adjective Luxuriant; overabundant.
• adjective Frolicsome; playful.
• adjective Obsolete Rebellious; refractory.
• intransitive verb To behave in a wanton manner; act lasciviously.
• intransitive verb To move idly or playfully.
• noun One, especially a woman, who is licentious or promiscuous.

from The Century Dictionary.

• To revel; frolic unrestrainedly; sport.
• To sport or dally in lewdness; sport lasciviously.
• To make wanton.
• To spend or waste in wantonness.
• Ill brought up; undisciplined; unrestrained; hence, free from moral control.
• Characterized by extreme recklessness, fool-hardiness, or heartlessness; malicious; recklessly disregardful of right or of consequences: applied both to persons and to their acts.
• Wild; unruly; loose; unrestrained.
• Playful; sportive; frolicsome.
• Rank; luxuriant.
• Characterized by unrestrained indulgence of the natural impulses or appetites; dissolute; licentious.
• Particularly, unchaste; lascivious; libidinous; lustful; lewd.
• noun A pampered, petted creature; one spoiled by fondness or indulgence; also, a frolicsome, roving, sportive creature; a trifier: used sometimes as a term of endearment.
• noun A lewd person; a lascivious man or woman.

from the GNU version of the Collaborative International Dictionary of English.

• intransitive verb To rove and ramble without restraint, rule, or limit; to revel; to play loosely; to frolic.
• intransitive verb To sport in lewdness; to play the wanton; to play lasciviously.
• noun A roving, frolicsome thing; a trifler; -- used rarely as a term of endearment.
• noun One brought up without restraint; a pampered pet.
• noun A lewd person; a lascivious man or woman.
• adjective Untrained; undisciplined; unrestrained; hence, loose; free; luxuriant; roving; sportive.
• adjective Wandering from moral rectitude; perverse; dissolute.
• adjective Specifically: Deviating from the rules of chastity; lewd; lustful; lascivious; libidinous; lecherous.
• adjective Reckless; heedless.
• transitive verb obsolete To cause to become wanton; also, to waste in wantonness.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective obsolete Undisciplined, unruly; not able to be controlled.
• adjective Lewd, immoral; sexually open, unchaste.
• adjective obsolete Playful, sportive; being merry or carefree (often used figuratively).
• adjective obsolete Self-indulgent, fond of excess; luxurious.
• adjective Capricious, reckless of morality, justice etc.; acting without regard for the law or the well-being of others; gratuitous.
• adjective obsolete Extravagant, unrestrained; excessive (of speech or thought).
• noun A pampered or coddled person.
• noun An overly playful person.
• noun A self-indulgent person, fond of excess.
• noun archaic A lewd or immoral person, especially a prostitute.
• verb intransitive To act wantonly; become wanton.
• verb transitive To waste or squander, especially in pleasure (often with away).

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun lewd or lascivious woman
• verb spend wastefully
• verb behave extremely cruelly and brutally
• adjective occurring without motivation or provocation