10 English Phrases for Saying Someone is an Expert

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Everyday English Speaking Course

#1 – She was born to… [dance].

Use the phrase “was born to” (often with athletic or artistic activities) to say that the activity is perfect for the person’s abilities and life purpose.

#2 – He’s a natural.

Use this phrase to say that a person has “natural ability” to do something well and doesn’t need much help or teaching.

#3 – She could do it in her sleep / with her eyes closed.

Use this phrase when someone is so good, so well-practiced at an activity that they can do it “automatically,” without using much thought or effort.

#4 – He knows it inside out.
He knows all the ins and outs.

Both of these expressions mean that a person has detailed, comprehensive knowledge of a particular topic, activity, or area.

#5 – She knows [PLACE] like the back of her hand.

If you know a place “like the back of your hand,” it means you know the place extremely well.

#6 – She’s a walking encyclopedia of [TOPIC].

Use this phrase to describe a person who knows a lot of facts about a topic. This is often used for academic areas of study (physics, theology, etc.)

#7 – He’s in a class of his own / He’s in a class by himself.

These phrases don’t mean that a person is alone in a classroom! Instead, they mean that the person is so good that no one can compare to him.

#8 – He’s the best in the business.

Use this phrase to describe a professional who is excellent at their job.

#9 – She’s quite gifted.

This phrase describes someone who is intelligent  – especially a child whose intelligence is higher than average.

#10 – He’s a [math] whiz.

Describing a person as a “whiz” in a particular topic means the person is very good at that topic.

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