Does anyone remember yelling out "Get a horse!" to someone whose car had broken down? I can also remember kids yelling it out school bus windows at kids who were walking to school. An old phrase, long out of fashion. I would guess that the meaning of it is not known by anyone under 50. I'm of the generation who still related to the comment through memories of my grandparents. Yell at someone these days and you'll probably get a most curious look.
Click on either image to see them larger.
Another card from the Whitney Company in Worcester Massachusetts.