Ajosshi,
Korean generic term for a middle aged man you don't know.
Can be used in the Vocative Case as in "Ajosshi! I want to get out of the taxi here, please".
Most Korean apartment buildings will have a constant "Ajosshi" presence. Where I lived, the Ajosshi was in charge of 24-hour security, recycling, general maintenance, being a kindly old man, smoking, and sleeping on the sofa in his office.