casualness

a casual manner

familiarity
informality - a manner that does not take forms and ceremonies seriously
slanginess - casualness in use of language

He glanced towards Zero with attempted casualness.

casualness by HardaV December 17, 2016

planned casualness 

Use of maturely worded cliches to imply a level of maturity--of self-possession--that the speaker doesn't actually possess.

"I think your planned casualness rather gauche, rather inconsistent in comparison with your demonstrated behavioral spectrum."

planned casualness by shadyladyk March 6, 2010

chasualness 

Chill casual uniqueness

Your style is pure chasualness!

chasualness by Moniaaaaaaaaaaaaa October 30, 2010