A method, usually involving force, and sometimes involving the use of a straightener-outer or other such device, eg. a whip, used to bring the sinful heathen to their knees, for prayer, sex, general menial labor, or to pick produce up from the ground.
Like the 'Dick Whip'...the smacking, or slapping of an erect or semi-erect cock on someone (usually a female), in a 'take that' kind of way. The most common place is the face and/or mouth, but a cock wallup can be given on any part of the body.