A method used to measure a person's penis size. It is measured by where the skitmark is
left on the toilet bowl.
In the front indicates a small penis size, in the middle indicates a medium penis size or good sanitation after using the
toilet, and on the back indicates a big penis size.
This method works for mosts toilets, and is considered solid
proof.
Jon: "
Hey! Bob just got finished taking a
shit! He always brags about his big cock, let's check it out once and for all by using the
toilet ruler"
Kyle: "MAN! Bob really does have a huge dick! The skitmark is at the very back of the toilet bowl!"