Big Gus, What's the Fuss? (also known as Ha-Balash Ha'Amitz Shvartz, Schwartz: The Brave Detective and Fat Spy) is a 1973 Israeli comedy film written and directed by Ami Artzi and American director Lloyd Kaufman, the president of Troma Entertainment. The plot revolves around a Hebrew detective named Gus and his partner Harry who are hired by a woman to investigate a possible case of adultery.

The film was not released commercially until 2009, as an Easter Egg on The Sexy Box, a DVD boxset of Squeeze Play!, Waitress!, Stuck on You! and The First Turn-On!