Superlative:
The superlative is used to express the maximum or absolute capacity of an adjective. For example, "You are the best teacher."
Except under special circumstances, such as the word "best" in the example above, the superlative is formed by appending the letters "-est" to the word in question. Some examples:
-- Coolest, Fastest, Nicest, Gayest
I mean c'mon, kid... and for the record, Runescape was the shit back in the day.