This is my worst joke:

Chinese version:

两个包子在烤箱里。第一包子看了其他的包子一眼说：＂天啊！我们会死把！＂第二包子吃惊地说：＂天啊！一个包子会说话！＂

English version:

Two muffins are in the oven. The first muffin looks at the second muffin and says, "Oh my God. We're going to die!" The second muffin looks back at the first muffin and says, "Oh my God. It's a talking muffin!"