To play the part of the strong man, i.e. to push the cart and horses too; to be whipt at the cart’s tail.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Strommel * StrumNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes