Non-PRO English to Greek Other Idioms / Maxims / Sayings teenspeak idiom

The Online slang Dictionary describes its various uses thus:-

interjection
'An interjection used for almost anything anymore. (1) "I don't care," (2) "Yeah right! (sarcasm)" (3) Tacked at the end of a listing of things, like etc.
1) Speaker: Do you want to go uptown?
Response: (shrugs shoulders) "Whatever."
2) Huh? You want me to share this with you. Whatever!
3) Bring chips, cookies, pop; whatever.
4) I caught her cheating and she said, "whatever."
It constitutes a complete sentence or singular remark given in apathy by someone indifferent to others feelings or actions. Seems to be favoured by teens and adolescents. But I heard it used by two adults this very day in a local supermarket!
Whatever...
It is also used as a dismissive retort, meaning; "Shut up and go away." So it is also merely a sarcastic comeback.

Is there also in Greek a short word or phrase, which would fit the contexts here described i.e.
a brief dismissive colloquial phrase, generally a sentence in its own right; in effect an interjection, often but not always, "used as a passive-aggressive conversational blocking tool, leaving the responder without a convincing retort." (see Wikipedia under
https://en.m.wikipedia.org/wiki/Whatever_(slang).