Wiktionary
superbest
a. (en-superlative of: superb)
Wikipedia
SuperBest
SuperBest was a chain of Danish supermarkets with approximately 220 stores around the country.
In 2007 they took over the two supermarket chains Iso and Dreisler Storkøb. After NorgesGruppen bought a 49% stake in SuperBest's parent company Dagrofa, the SuperBest brand was discontinued in favour of NorgesGruppen more upmarket Meny brand.
Usage examples of "superbest".
So you see there was simply nothing to be done now, but play their right bower—bring out the superbest of the superb, the mightiest of the mighty, the great Sir Launcelot himself!