The simplified version of their real name that pretty much anyone who doesn't have a totally White-bread name comes up with to give out when (loud, white) people at bars, clubs, etc. come up and ask what their names are.
Useful for avoiding annoying, endless repeated attempts by the asker to 'get the name right', or avoiding the inevitable "So where are you from? ...So where are you *really* from?" questions.
Almost always only a syllable or two, and easy to shout in someone's ear when the music is loud.
Often a middle name or something that the person doesn't normally go by.
"Hi, I'm Shan!" -Bar name of Shaniqua
"Hey man, I'm Zee, nice to meet you" -Bar name of Zaid