The first definition for "the 8" is a guy whom no matter what the circumstance he will listen to others and do what they say. The second definition is a slang term used for a computer. The 8 could also mean somebody who is full of useless information just like a computer and uses false words and needless phrases at the wrong time.
DJ: The 8 buy me China Garden NOW!
JP: Okay DJ whatever you want man.
JP: Can I buy 2 coolers off of you?!
DJ: We are in the middle of the fucking woods,do i look like a liqor store to you the 8!? Give me 40 dollars tomorrow for them
JP: alright man if i'm not there at 11 I owe you 50 bucks instead.