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A weapon carried by a serjeant of foot. To get a halbert; to be appointed a serjeant. To be brought to the halberts; to be flogged a la militaire: soldiers of the infantry, when flogged, being commonly tied to three halberts, set up in a triangle, with a fourth fastened across them. He carries the halbert in his face; a saying of one promoted from a serjeant to a commission officer.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Hair Splitter * Half a HogNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes
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Francis Grose was independently wealthy, having inherited money from his father, a jeweller. Finding himself overspending, he published a number of books; his Provincial Glossary seems to have been the starting-point for the Vulgar Tongue reproduced here.