hotshot

noun
UK /ˈhɒtʃɒt/
US /ˈhɑːtʃɑːt/

A hotshot is someone who is very good at something and knows it.

The new hotshot lawyer won every case that year.


OTHER MEANINGS

2. A person who is very important or successful and acts in a bold, confident way.

He walked into the meeting like a hotshot executive.

3. A fast, reckless driver.

The hotshot sped past us on the highway.

4. A type of small, fast train or vehicle.

The hotshot train carried mail across the country.