What is the meaning of fooling?

verb

• Make a fool or dupe of.
  • synonyms: fool, gull, befool
• Spend frivolously and unwisely.
  • usage: "Fritter away one's inheritance"
  • synonyms: fritter, frivol away, dissipate, shoot, fritter away, fool, fool away
• Fool or hoax.
  • usage: "The immigrant was duped because he trusted everyone"; "You can't fool me"
  • synonyms: gull, dupe, slang, befool, cod, fool, put on, take in, put one over, put one across
• Indulge in horseplay.
  • usage: "Enough horsing around-let's get back to work"; "The bored children were fooling about"
  • synonyms: horse around, arse around, fool around, fool

adjective

• Characterized by a feeling of irresponsibility.
  • usage: "a broken back is nothing to be casual about; it is no fooling matter"
  • synonyms: casual