Chicago Slugger is a term used to refer to the legendary baseball player Sammy Sosa, who played for the Chicago Cubs from 1992 to 2004. He was known for his powerful home runs and earned the nickname 'Chicago Slugger' due to his impressive batting skills. During his time with the Cubs, Sosa hit 609 home runs, making him one of the most prolific home run hitters in Major League Baseball history.