What does "look for B.O.B." mean on those signs at grocery stores?

I see these little and big signs all over the place and Ive always wondered what it meant. Its obviously something for the employee and I did a google search but came up with nothing?

Any former grocery store employees or anyone know? Im sure its something very simple and Ill prolly feel dumb when you tell me lol, at least dumber than normal

Bring your Own Bag

Bring Own Bazooka

Guaranteed discount.........................

Barack O Bama

You get a discount if you're The President...........

I like this one a lot

Battery Operated Boyfriends.  Vibrators in other words, less offensive to the customers.

Bring your own babe

and stop hitting on our clerks douche bag.