adj. The smallest increment of measurement, that you can see with your naked eye, known to man. About the width of a cunt hair.
Dude A- "I was watching that no-talent, left-hand turning, waste of a sport, they call Nascar the other day and the 2 best left-turners were red-neck-and-neck to the finish line. There must have been mere inches between first and second place!"
Dude B- "I saw it dude. But it was closer than that! It was only about a cuntimeter of difference on the photo replay!"