This is the 521st most frequent Estonian word.
taavi
"Taavi" is an Estonian male given name, equivalent to "David" in English.
Here, 'Taavi' is used as a proper noun, representing a person's name.
Taavi läks täna raamatukokku.
Taavi went to the library today.
In this sentence, 'taavi' is used as a colloquial term or nickname for people perceived as smart or clever.
Koolirahvas nimetab kõiki viskasid taaviks.
The school folks call all clever people 'taavi'.
Here, 'taavi' is used figuratively to denote a hypothetical person or character trait, possibly in a metaphorical or idiomatic sense.