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4.
NSFL also known as NLS means Not Safe For Life or Not Life Safe normally referring to a link someone or some website has sent you meaning no one should ever see it.
www.2girls1cup.com is NSFL no one should ever see that
by Kelby Raper January 27, 2008
135 170
 
1.
Not Safe For Life. Goes a step beyond NSFW, because it doesn't matter where you view the material; you will be scarred.
Why did I click on goatse? That shit is NSFL
by Jachmaninoff August 17, 2007
4061 2417
 
2.
Not Safe For Life
Dude: Intrested in car accident pics.
Alien: are they NSFL?
by Miko Jack May 08, 2010
170 126
 
3.
NSFL also known as NLS means Not Safe For Life or Not Life Safe normally referring to a link someone or some website has sent you meaning no one should ever see it.
the video at 1guy-1cup.com is NSFL.


by fukendrinkin January 10, 2009
178 180
 
5.
Not Safe For Lunch. A warning that linked content is sufficiently horrendous as to be sensibly avoided by the weak of stomach.
This website|image _link_ is NSFL.
by Morosoph October 12, 2008
119 245