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general::
Phrase(s): have one’s hand in the till [and] have one’s finger(s) in the till
Fig. to steal money from one’s employer. • James couldn’t afford that car on just his salary. He must have his hand in the till. • Sally was outraged when she found that one of her salesclerks had his fingers in the till.
McGrawhill's American Idioms And Phrasal Verbs