The spelling of the word "didst to a t" is peculiar and not commonly used in modern English language. The word "didst" is a past tense form of the verb "do" and means "you did." It is pronounced as /dɪdst/ where the "d" is pronounced with the tip of the tongue and the "st" is a cluster of two consonant sounds. The addition of "to a t" is an idiomatic phrase that means "perfectly" or "just right." Therefore, "didst to a t" means "you did perfectly."