What does grosz mean?

Answer 1

"George Grosz (July 26, 1893 - July 6, 1959) was a prominent member of the Berlin Dada and New Objectivity group, known especially for his savagely caricatural drawings of Berlin life in the 1920s."

unless you meant the German word "Groß" and in English I would have to say it's equivalent to big,grand,heavy,huge,wide,tall,etc... depends on the context used in the sentence.

if neither one of those helps then would you please expand on the question a bit more? Like giving us the sentence in which you heard it used?

Grosz is a coin in Poland too. 1 zloty= 100 groszy (grosz=singular, grosze, groszy=plural.