A South Side or Southside is an alcoholic beverage made with gin, lime juice, simple syrup and mint.

It has been proposed that it gets its name from either the South Side district of the city of Chicago, Illinois, or from the Southside Sportsmen's Club on Long Island.

[2] The gin imported by Capone's rivals on the North Side of Chicago was smooth, and usually consumed with ginger ale.

[2] However, the gin consumed by Al Capone's gang had a rougher finish, and required more sweeteners to make it palatable.

[3] A South Side Fizz adds soda water:[4] In a shaker, muddle the mint, lime juice and simple syrup.