Any content or material that is deemed not appropriate for work. Not safe for work.
WTF, mate. Brittany Fleit is NSFW.
by gobbleturkeygobble March 3, 2011
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Not safe for work
You should never open the file at work if it has 'nsfw' in the name
dam bro her videos are nsfw
by Jameseatspi November 11, 2007
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This drink is NSFW

(SFW = Straight Fucking Water)
Human 1: Where is my SFW?

Human 2: here *gives human 1 the SFW*
Human 1: *spits out SFW* THIS IS NOT SFW THIS IS NSFW
by Pizza Place July 25, 2019
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Not safe for weebs.

It's when you say something that pisses off an anime fan
Holy shit that Naruto fan got pissed at me for saying Goku can wreck him, I guess it was nsfw for him
by Pissed off Weebs November 26, 2016
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NSFW is an acronym for words like "Not Safe For Work" and "Not For Showing Wife"

Basically it is also a category of some things that is to be shared that is often inappropriate and contains mature content.
Bob: Hey bro, what does NSFW stand for?
Billy: It stands for "Not For Showing Wife".
Bob: Does that mean porn?
Billy: I guess you could say that...
by Daviddv0601 August 21, 2016
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Not Safe For Work.
Often used to describe porn, which will get you fired if caught viewing it in the workplace.
Fred: No one will notice me looking at this NSFW stuff!

Andy: Fred, is that tentacle rape?

Fred: Yes, why?

Andy: If the boss catches you...

Fred: OMGWITFBBQ *tries to alt-tab to ESPN*

*boss walks in*

Boss: Fred, why are you looking at pornography?

Fred: Well I wa-

Boss: I don't want to hear it. You will not be missed.

Fred: FUUUUUUUUUUUUUUUUUUUUUUUUUUUUU-
by InvisibleWater July 1, 2012
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Acronym for Not Safe For Work. Basically stands out as a warning to those at work. It warns people of adult content that your boss or another manager could fire you for looking at.
Website: The place you're about to enter is NSFW.
by RookieAttorney January 12, 2014
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