A rural sport practised at wakes and fairs in Derbyshire; a ram, whose tail is well soaped and greased, is turned out to the multitude; any one that can take him by the tail, and hold him fast, is to have him for his own.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Tup * T—dNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes