Definition of "insouciant" [‖In•sou•ciant]

• Marked by blithe unconcern; nonchalant. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "There's a wonderful cover shot to the 1958 album Legrand Jazz, with pianist-composer Michel Legrand wearing an expression of insouciant expectation, Gauloise at the corner of his mouth, indolently summoning invisible sidemen to action."
• "I laughed so much with both surprise and delight that I gladly relinquished the bread to gabbling beaks and they went on their way to steam-roller another 'insouciant' picnicker."
• "She was slinky in a short black skirt with ridiculously high heels -- nosebleed heels -- and she moved across the stage in a kind of insouciant shimmy."