1. Characterized by a feeling of irresponsibility
   "a broken back is nothing to be casual about; it is no fooling matter"
   - casual

1. Make a fool or dupe of
   - gull, befool [archaic] 
2. Spend frivolously and unwisely
   - fritter, frivol away, dissipate, shoot, fritter away, fool away 
3. Fool or hoax
   "You can't fool me!"
   - gull, dupe, slang, befool [archaic], cod, put on, take in, put one over, put one across 
4. Indulge in horseplay
   "The bored children were fooling about"
   - horse around, arse around [Brit, Cdn], fool around, arse about [Brit]

See also: foolery, light

Type of: betray, consume, cozen, deceive, delude, jest, joke, lead astray, lead on, play, squander, ware, waste

Encyclopedia: Fool Fool, The Stage Spirit

• ill-defined
• ill-disposed
• ill-dressed
• ill-equipped
• ill-famed
• ill-fated
• ill-favored
• ill-favoured
• ill-fed
• ill-fitting
• ill-formed
• ill-gotten
• ill-humored
• ill-humoured
• ill-informed
• ill-judged
• ill-mannered
• ill-natured
• ill-omened
• ill-proportioned
• ill-scented
• ill-shapen
• ill-smelling
• ill-sorted
• ill-starred