A person whom I met recently said something that I consider a bit odd. During our conversation, the topic of lost items arose. "Personally," he said, "I'm glad that over all the years I have not lost a thing that is ninesigma worthy." Not knowing what he meant, I could only nod in assent and quickly change the subject.
Can anyone tell me what the phrase, "ninesigma worthy," means, and why a person might express himself in that manner?