This is the 9349th most frequent Russian word.
тайсона
"Тайсона" is not a standard Russian word; it might refer to the name "Tyson" (e.g., Mike Tyson) in a possessive or descriptive form.
Here, 'Тайсона' is the genitive form of the proper noun 'Тайсон', indicating possession or association (about Mike Tyson).
Я видел фильм про Майка Тайсона.
I saw a movie about Mike Tyson.
In this sentence, 'Тайсона' is in the accusative case, here used metaphorically for comparison.
Моя кошка напоминает маленького Тайсона.
My cat reminds me of a little Tyson.
Here, 'Тайсона' is in the accusative case, referring to being the object of discussion (we mentioned Tyson).