Super-fresh. Being of the utmost freshness.
This new Old Spice is the freshershest deodorant I have ever used.
Someone or something that is fresher than freshest. This is the pimps of the pimps. You cannot call yourself freshershest, because someone who is freshershest would no call themselves freshershest.
A very good looking beard can be freshershest if it is a very good looking beard. I mean fu-man-chu beard, not just a scrub beard.