Green’s Dictionary of Slang

(US) a mean, avaricious person.

1889		Century mag. (NY) XXXIX 227/1: Occasionally he would refer to the president of the Off-shore Wrecking Company, his former employer, as ‘that skin’.
1900		Ade More Fables in Sl. (1960) 110: His Lawyer used to say that Henry was a Skin.