John Hancocked means in slang: Being “John Handcocked,” is to allow a man to ejaculate his ***** into his hand and then slap another person across the face. Named after the proverbial man’s “ink”, which comes out of his pen. The man then marks his territory and claims the land. It is especially appropriate for Ugly Sweater Christmas Parties or any time a prostitute goes out of control. This is especially applicable for girls who may be owners of a California Tan boutique or hail from Appalachia. (in Slang Dictionary, added by Conrado Díaz)