sexのようなどんな単語でも探してください。
 
1.
This phrase is used when a person on the internet mentions something of interest, but needs proving. Usually pertains to a girlfriend or a rare item. Can be translated into: "I do not believe the statement you have made is true. I demand evidence in the form of photographs."
Lutek: "My girlfriend is coming over tonight."

User: "PICS NAO!!!".
SRdustによって 2008年12月04日(木)
 
2.
Means Pictures Now.

Origin: Gamefaqs(board 8) referring to topics about people's sisters
MichaelB:I have a sister who plays soccer.
SharpEdge: picsnao!
David Jaigeによって 2006年10月28日(土)