Estudiantes vs. Gimnasia is the lion (Leon) vs. the wolf (El Lobo) and Los Pincharratas vs. Los Triperos. Pincharratas means 'The Rat Biters'. Some say that the name derives from experiments performed in La Plata's university. Los Triperos means 'The Slaughter House Attendants' because Gimnasia's first players worked in the city's cold meat storage. Estudiantes was born out of Gimnasia when some members decided to start a new club.