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NSFW is an abbreviation for words like Not Safe For Wife, Not Suitable For Work, but mostly accepted as Not Safe For Work.

It is an internet slang that is often used to describe online posts that are mainly associated with heavy nudity, sexual, heavy profanity and other things that could often link with pornography. Most of the time, NSFW is used for a fandom of some sort when people want to discuss and share the sexual and porno side of the fandom.
Check out my post for Star Wars!

Warning: NSFW!
by Daviddv0601 January 28, 2017
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Not Safe For Work. Used to describe Internet content generally inappropriate for the typical workplace, i.e., would not be acceptable in the presence of your boss and colleagues (as opposed to SFW, Safe For Work).
by The Internet September 12, 2003
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Short for Not Safe For Work. Warning for people who just skive at work and just play around on the Internet on someone else's computer and time. If you do that you deserve to be caught looking at porn at work.
"Don't go on Tumblr , it's NSFW."

"Unlike you I actually do my job at work and don't slack off wasting the company's time."
by Goth Doll July 30, 2016
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Now Show Friends and Workmates - a suggestion that the viewer draw the attention of friends and/or workmates to their computer screen before following a link or viewing further content. This indicates that the following content is interesting, informative or inspiring, usually in such a way that it will get the viewer promoted and increase workplace productivity.

No, seriously, this shit will get you fired.
by trolololcat December 30, 2011
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Not Safe For Work, used to refer to documents that would probably get you fired if you were looking at them on worktime. Usually R rated or higher.
Warning: This icture is NSFW.
by TweedyChic May 12, 2005
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