old hand at something

an old hand

One who has experience doing a particular task. If you have any questions, ask Andrea—she's done this job before and is an old hand at filing. I've been a bus driver for seven years, so I'm an old hand at this.
See also: hand, old
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

old hand (at something)

n. someone experienced at doing something. I’m an old hand at fixing cars.
See also: hand, old, something
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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