jackhand

a jackhand is a very skinny boy who has freckles. he is usually either very posh or very naughty or a mix of the two. he is likely good at sport and has a squeaky voice

When a man grips his penis with both hands, fist over fist (requires substantially sized penis), and then has the partner grasp both of his forearms and create a motion similar to that of a jackhammer. A variation can be done by a woman holding a dildo.