Baby On Board refers to a sign intended to be placed in the back window of an automobile to deter tailgating. Maybe you don't have a baby on board, but something else you love as if it were your child such as a dog, a cat, your favorite alcoholic beverage...Now you can where a funny 'on board' t-shirt to deter tailgaters and gain admirers! FunnyShirtFarm.com has funny Baby On Board shirts and other humorous novelty on board t-shirts at great prices.