South Sydney Rabbitohs Logo

The club mascot is the rabbitoh, a now-disused term that was commonly used in the early 20th century to describe hawkers who captured and skinned rabbits and then sold the meat at markets,[40] so named because they would shout "rabbit-oh!" around the markets to attract buyers. The club is also informally referred to as the Rabbits, Bunnies or Souths.

Exactly how South Sydney came to be known as the Rabbitohs is unknown. According to one version of events, dating from pre-schism days at the turn of the 20th century, some of the club's players earned some extra money on Saturday mornings as rabbit-oh men, staining their jerseys with rabbit blood in the process; when they played in those blood stained jumpers that afternoon, opponents from wealthier rugby clubs did not always appreciate the aroma and would mockingly repeat the "Rabbitoh!" cry.[41] Another version was that the term was a disparaging reference by opposing teams to South's home ground being plagued with "rabbit 'oles"; in those early days Redfern Oval was then known as Nathan's Cow Paddock.[6] A third version claims the Rabbitoh name was adopted from that of the touring Australian rugby union teams of the early 1900s who were nicknamed "Rabbits" prior to discarding the name in 1908 in favour of the moniker "Wallabies".[42]

The "Rabbitoh" emblem, a running white rabbit, first appeared on the team's jersey in 1959. The Rabbitoh emblem has in various forms been carried as the club's crest on every player's jersey ever since. The original "Rabbitoh" emblem design that appeared on the team's jerseys throughout the 1960s and 1970s has now been incorporated on the current jersey.

The South Sydney Rabbitohs celebrated their centenary year during 2008. The club released a centenary emblem to commemorate the occasion. To also coincide with the centenary year, Souths opted to alter their logo by removing the red and green oval from their emblem for a solid white rabbit with the words South Sydney Rabbitohs set in uppercase type.