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Not Safe For Life. Stuff that isn’t appropriate no matter where you are, how old you are, or what time it is. NSFL content is usually gore. Examples of NSFL content include: Goatse, kekma.ga, a lot of videos on Liveleak, 1 Guy 1 Jar, 2 Guys 1 Hammer, etc.
I was on an NSFL content binge last night because I was bored and I had morbid curiosity. I was extremely traumatized and couldn’t sleep at all
NSFL by nlolhere July 20, 2020
Related Words
NSFL NSFH nsfhc NSFHE NSFLB NSFTL nsfwl NSFYL
Acronym for Not Safe For Human Eyes; Something so incredibly inappropriate or grotesque that it is not only unsuitable for work but for human eyes in general.
Goatse, Lemon Party, and Tubgirl are NSFHE.
NSFHE by John X. Doe July 8, 2005
Basically, NSFL means “not safe for life”. It’s when something is so scarring that even Satan himself would fear it. A lot of Bait-And-Switch sites use NSFL content for “a joke” when it’s really not. Some of these Bait-And-Switch include, but are not limited to: kekma.ga, dance.swf ,womansalliance.xyz and so on. Those are just some examples
User 1: Hey, Mike! You should check out (bait and switch site)! It’s so cool!

User 2: First, how do you know my name, and second, I’m not clicking that link.

User 1: Just click it!

User 2: Ok, fine. (clicks it) WHAT IN THE LIVING FUC~!

Moral: Don’t click on random links. It could be one of those NSFL sites.
NSFL by wide cat August 18, 2021
Really, really messed up content. Like, most doctors and chronically online people cannot handle it. Usually means gore, killings, surgery. etc.
Girl: This pic my husband sent me has me scarred for life! Is it NSFL?
Friend: No crap sherlock, he's a doctor
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
NSFL by Jachmaninoff August 21, 2007
Word of the Day on January 9, 2009
Not Safe for Humanity - Usually used to describe an extremely disturbing or overly adult thing that can and will scar, disturb and make hundreds of people go "What the crap!?"
$00pah NiN10Doh! Pokemon Snap XXX = NSFH
NSFH by ruff1298 February 26, 2009