A woman, wife, or mistress. Brush to your froe, or bloss, and wheedle for crop; run to your mistress, and sooth and coax her out of some money. Dutch.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
See also the definition in Nathan Bailey's 1721 dictionary of canting and thieving slang.
To Frisk * FroglanderNathan Bailey's 1721 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes