This is the 6042nd most frequent Polish word.
adidas
In Polish slang, "adidas" refers to athletic shoes or sneakers, regardless of brand.
Here, 'adidasy' is an informal term in Polish referring to sneakers or sports shoes, derived from the brand name Adidas.
Mam nowe adidasy.
I have new sneakers.
In this case, 'adidas' refers to items of the Adidas brand generically.
Nie mam adidas w swojej szafie.
I don't have any Adidas (brand items) in my wardrobe.
Here, 'Adidas' is used as the proper name of the sportswear company.