Nonchalant

[Little_Girl]

Seeming to be coolly unconcerned or indifferent.
-- its ALL good. no drama.none of that.

[Sonia]

Uncaring; Not To Enthusiastic, Angry or Annoyed By Things Going on; Calm

[PussyCat]

not giving a shit.

[Mark Zuckerberg]

acting cool, calm,

having indifference or easy unconcern

Abby

[Rihanna]

calm- Acting as if nothing happened

[Rihanna]

to act as if you are humping something, humps a lot

[Magaret]

behaving in a calm manner, often in a way that suggests you are not interested or do not care:

[Tanya Shivari]

(of a person or manner) feeling or appearing casually calm and relaxed; not displaying anxiety, interest, or enthusiasm.