What are skeletal muscles somtimes called and why?

Those are your skeletal muscles — sometimes called striated muscle because the light and dark parts of the muscle fibers make them look striped

You did not show us the image of the burger, but i shall try to answer as best i can.  when purchasing food, always consider the ingredients as well as the person who prepared it. consider if they were hygienic people or not, in case the burger was infected with bacteria. no mortal should place an infected burger into their mouth.   

Well. erm obesity, anorexia?