Schnack is a word from Low German which refers to a chat or in derogative meaning a gossip.
Schnack is a surname. Notable people with the name include:
A. J. Schnack, American documentary filmmaker Anton Schnack (1892–1973), German writer Filip Schnack (born 2001), German actor Larry G. Schnack, American academic Yasmin Schnack (born 1988), American tennis player
See also C.A. Schnack Jewelry Company Store, Commercial buildings on the National Register of Historic Places in Louisiana