What are those thingies called

[SPAGo 98]

Those things that people carry to advertise, where you're like sandwiched between 2 signs? YOu know what I mean, where the person is a walking sign.. Bleh.

 

[PamOKW]

sandwiched between 2 signs

That's almost the name. They call it a sandwich board.

 

[Nutsy]

Yep that's it alright...........

A SANDWICH BOARD