A jankety gangsta. Someone who is quite convinced they are a gangsta, but maybe their pants are a little too short, or their gold teeth are really bronze.
Jankstore - from the root word 'janky' & similar in spirit and context to a 'creepstore'. A person that personifies bad qualities. The master of janky. A person or place where only the poorest or worst things are distributed.
If you thought Jerry O'Connell was a janky motherfucker, you should meet his brother. That guy is an epic jankstore.