nsfu 

Not Safe For You - Similar to NSFW , but more personal

<Bob> Hi, can i see a picture of your boobies?
<HawtGirl69> No, you're like 12.. NSFU!

nsfu by HawtGirl69 December 14, 2008

NSFU 

Not Safe For the Universe, used to describe something that shouldn't exist, and nothing in the universe wants to know.

goatse, tubgirl, lemonparty, and 2 girls 1 cup are all nsfu.

NSFU by Zeddekesu January 12, 2009

nsfu 

Need for Speed: Underground - A game where the inner 'street racer' comes out in all of us.

You pick up nfsu yet? I'll out drifto j00!!

nsfu by sva4lyfe December 7, 2003