The third gentleman now stepped forth. A mighty man at cutting and drying, he was; a government officer; in his way (and in most other people’s too), a professed pugilist; always in training, always with a system to force down the general throat like a bolus, always to be heard of at the bar of his little Public-office, ready to fight all England.
The paragraph is from HARD TIMES by Charles Dickens. I would like to know what does " A mighty man at cutting and drying" here mean. Thanks.