Question

to be an old hand - If you need help, ask John. He's an old hand at fixing computers.  - How did she manage to get him to behave so well? - Well, she's an old hand at dealing with difficult kids.  - Having worked at the university for almost two years now, she's an old hand at her job.  - I'm an old hand at this now, and answer most of the questions before they've asked them.

Accepted Answer

to be experienced and good at something

Idiom	to be an old hand
Definition	to be experienced and good at something
Examples	- If you need help, ask John. He's an old hand at fixing computers. - How did she manage to get him to behave so well? - Well, she's an old hand at dealing with difficult kids. - Having worked at the university for almost two years now, she's an old hand at her job. - I'm an old hand at this now, and answer most of the questions before they've asked them.

Hand She's Experienced Good John Fixing Computers Manage