Slim \s-lim\ as a boy's name is of English origin, and the meaning of Slim is "slender". Usually used as a nickname for a thin person.

Baby names that sound like Slim are Salim and Selim. Other similar baby names are Sim, Alem, Clem, Elam, Eliam, Felim, Halim, Sail, Salem, Sam, Samm, Selig, Sima and Sly.