semmudtoh Share definition Flag a crazy person that saids the stupids thing at the right time and can't spell. he kill commander ReD then became semmy! IT WILL WOW YOU! My friends call me Semmy semmudtoh by Semmudtih October 10, 2003 0 0 Get merch Get the semmudtoh mug. Buy Now — $32.95 See more merch