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1.
To not only be horrendously bad at something, but be convinced of your amazing and overwhelming talent at it.
"Only me and Barry get booed... Only good players get booed" - Neifi Perez

"Way to go Mr. Nash, you totally neified taking steps!"
by Zedar March 24, 2004
 
2.
The Absolute worst You can possibly be at something.

Also: An immediate threat to the future of San Francisco Giants baseball
I was playing Risk like Neifi Perez plays shortstop, of course I lost.
by Nise March 24, 2004