Learn what "you don't know what you're talking about" means, when people say it, and how to use it naturally in English.

It means the speaker thinks the other person is wrong or uninformed.
From Conflicted Hearts, Episode 10
The speaker is rejecting another person's opinion in the middle of an argument.
Use this in a fight only if you want to sound harsh or disrespectful. It is common in arguments but can be insulting.
Scenes unlock real expressions as you watch
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