This is the 6757th most frequent Russian word.
taf
The word "taf" does not exist in standard Russian. It may be a slang term, typo, or borrowed word; more context is needed.
Here, 'taf' is used as a noun that could represent possibly a strong material or object, but explanation might depend on context.
Этот таф очень тверд и устойчив.
This taf is very hard and stable.
In this sentence, 'taf' might mean 'tough', possibly used figuratively to depict someone's resilience.
Она таф, всегда справлялась с трудностями.
She is tough, she always overcame difficulties.
Here, 'taf' is treated as a verb in a language learning context, indicating an action of causing irritation.