1. [1930s] (US) a banjo.
2. [1970s+] (US gay/prison) the penis.
[1980s+] (Aus./US) an Asian.
[1900s–30s] (US tramp) a tramp who would beg but does it poorly and will therefore work (at a labouring job) when necessary.
SE in slang uses
[early 19C] a pot of porter.