Wow! This sounds like a whole "underworld" complete with nicknames.
Oh yeah, big time. Just a few:
MUGU: Scam victim, literally "bog fool" in Igbo, a Nigerian dialect.
MAGA: Victim, interchangeable with Mugu.
Guyman: The low level guys in the scam organization who sit in the Net Cafe's
all day sending and answering emails. They are not usually very skilled,
and only get paid a percentage of what the final damages to the victim are.
If they think they've got a "live one", they're passed on to someone with
better skills/more experienced.
The OGA: The boss who organizes the ring. He pays for the cafe time, any
fake documents that need to be created, opens bank accounts, etc.