Not?

I heard that came from (once again) Billy the Fatass! He always ranted on Scott to shave his head (back in 1985) and Scott was like "NOT"!
 
I read a long time ago that one of their friends started saying "NOT" all the time.
He'd be like, "Dude! Not!"
 
"I'm the man" still cracks me up everytime I hear it. I always say it like that stuttered sample at the end of the song & that's why it's under my name like that...........