A lick and a smell. He comes in for only a dog’s portion; a saying of one who is a distant admirer or dangler after women. See Dangler.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Dog Latin * Dog’s RigNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes