Slang used all the time by Young People
n. • Something cool, incredible or impressive.
Note: In the 90s it was used as a title of a movie about two money changers, and back then "sztos" meant "acting fast" or "something surprising". In 2016 "sztos" was chosen as the Youth Word of the Year in Poland.
"Nowy film Tarantino to sztos!"
"Tarantino's new movie is sztos!"
3 out of 5 Polish speakers have heard this