The youngest officer in a regimental mess, whose duty it is to skink, that is, to stir the fire, snuff the candles, and ring the bell. See Skink.—To ride in any one’s old boots; to marry or keep his cast-off mistress.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Boot Catcher * BootyNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes