1. [late 19C] (US) a seller of counterfeit money.
2. [20C+] a male prostitute.
3. [20C+] (also dope peddler) a drug seller.
4. [1930s] (US tramp) a freight or goods train, a stopping train.
5. [1960s] (US prison) one who provides any form of contraband within the prison.
SE in slang uses
see pedlar’s French n.
see dick peddler under dick n.1