Definitions of flirt:

• noun:   playful behavior intended to arouse sexual interest
• noun:   a seductive woman who uses her sex appeal to exploit men
• verb:   talk or behave amorously, without serious intentions

  Example: "My husband never flirts with other women"

• verb:   behave carelessly or indifferently
• name:  A surname (very rare: popularity rank in the U.S.: #51848)