A heat, chafe, or passion; as, What a pelt he was in! Pelt is also the skin of several beasts.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Pell-mell * Penance BoardNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes