Literally means, "on all fours", this command means to kneel and drop to all fours, arms straight and palms flat on the ground, fingers together. The slave keeps her head straight out, facing down or slightly uplifted. Based on reference to a cart, four wheeled vehicle. On IRC, for entry to a channel this is normally followed by a form of Obeisance, or submission and is often confused as being all in one as one position.