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know the ins and outs
/noʊ ðə ɪnz ænd aʊts/◆idiom
to understand all the details
She knows the ins and outs of the legal system.
She understands all the details and complexities of the legal system.
informal
To have a thorough understanding of all the details, complexities, or workings of something
After years of working in the industry, he knows the ins and outs of the business.
He has a deep understanding of all the details and complexities of the business.
If you want to succeed, you need to know the ins and outs of the market.
You need to understand all the details and complexities of the market to succeed.
This phrase is often used to describe someone who is very knowledgeable about a particular subject or field.
Related Phrases
Pro Tip
Usage Tip
This phrase is often used to describe someone who has a deep understanding of a subject, but it can also be used to describe someone who knows how to navigate a system or process.
Gold Rule
Correct Usage
Use this phrase to describe a thorough understanding of something, not just a basic knowledge.
Word Origin
The phrase likely originates from the idea of knowing the inner workings (ins) and outer details (outs) of something.
Usage Notes
This phrase is commonly used in both formal and informal contexts to describe someone who has a deep understanding of a subject.
English Dictionary