Because he is a mouthy, insouciant rascal with a great shtick.
With that mask on, I fluff the ends of my hair into a structured but insouciant flip.
It is an example of insouciant royal play, and the fun of something going wrong.
Together they read like a dive-bar lecture series: insouciant, slightly surly, mock profound.
Addicks leaned back on the cushions of his chair in the easiest, most insouciant way imaginable.
Edestone's reply was as insouciant as if he had been merely commenting on the weather.
To this enchanting spot came Humayun and his ladies full of life, to be insouciant and gay.
Up to this she has led a bird's life, gay, insouciant, free and careless.
Or, if he is an insouciant sort of person, he would more properly be titled, Prince Don't-Kar-a-toff.
More or less—an insouciant manner, and a rather startling button-hole.
unconcerned, undisturbed; carefree and nonchalant
Latin in- + soucier 'to disturb'