Know what you’re talking about
Definition 1 of 2
Pro Tip 1/3Self-assurance
The phrase implies confidence in one's own understanding or expertise on a topic.
Trust me on the software update—I know what I'm talking about.
Pro Tip 2/3Expert Opinion
Used to emphasize that the speaker has a depth of knowledge, often from experience or study.
She can give you advice about taxes; she knows what she's talking about.
Pro Tip 3/3Conversational Credibility
Asserts credibility in a conversation and may discourage others from questioning the speaker.
Listen to Dr. Shaw discuss the treatment—he knows what he's talking about.
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