1. [mid-19C+] a general term of affectionate address; usu. as old bean
2. [1910s] (US) a foolish or unpleasant person.
3. [1920s] (US black) a black person.
4. [1970s] any person.
[late 19C] (US Und.) a high-class confidence man.
1. [1910s+] a fellow, a term of address, usu. to a man.
2. [1940s] an old person, seen affectionately or kindly.