to be a dab hand at (doing sth)

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• dab hand — UK US noun [countable] [singular dab hand plural dab hands] british informal someone who is very good at something dab hand at: She’s a dab hand at DIY …   Useful english dictionary

• hand — 1 noun PART OF THE BODY 1 (C) the part at the end of a person s arm, including the fingers and thumb, used to pick up or keep hold of things: He held the pencil in his right hand. | Go wash your hands. | hold hands: They kissed and held hands. |… …   Longman dictionary of contemporary English