1. Not methodically or according to plan
   "he dealt with his course work casually" 
2. In an unconcerned manner
   "glanced casually at the headlines"
   - nonchalantly

See also: casual

• scouring pad
• scouring rush
• scours
• scouse
• Scouser
• scout
• scout car
• scout group
• scout troop
• scouter
• scouting
• scouting trip
• scoutmaster
• scow
• scowl
• scowling
• SCPO
• scrabble
• scrabbly
• scrag
• scrag end
• scraggly
• scraggy
• scram
• scramble