Formerly, in the better old days, a business term of art used to describe the insignificant or immaterial numbers or aspects of the business that the PC Police have taken away with most of life's other small pleasures.
Older manager says - these 2 companies are the material ones. All the other ones are mice nuts.
A hardo is a person who tries extremely hard at everything. Most times a hardo will try very hard at things that do not require excessive effort. For example, sports practices, gym class, etc.
Wow did you see Jack at practice today? What a hardo!