Learn the tone, meaning, and better English alternatives around "i don't know" with real scene examples.

It means the speaker thinks the other person is being unrealistic or delusional.
From I'M Obsessed With My Boss Part Ii, Episode 4
The speaker dismisses the other person's view as unrealistic.
Use this in a heated argument to attack someone's sense of reality. It is insulting and very rude, so learners should avoid it in polite conversation.
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