What Happens Grandma Stays T-Shirt – This is kinda creepy, but it most likely means that indulgent Grandma has got grandkid's back. Enjoy. Our What Happens Grandma Stays T-Shirt is under the Funny T-Shirts section of our store. As one of our best designs, this Funny T-Shirt features bold lettering on solid background and on its front that says What happens at Grandma's stays at Grandma's This soft but durable t-shirt it makes a great gift for someone who likes senior humor. Our shirts are made from premium quality blank tees that are 100% Cotton. Our What Happens Grandma Stays T-Shirt is incredibly comfortable and it is made to last. Our Funny T-Shirts are available in the color and the size of your choice from the listed options. If you have any questions or suggestions regarding our What Happens Grandma Stays T-Shirt or any of our other Humorous T-Shirts let us know the name of the product and details of your question in an e-mail.