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).

Acronym: Not Suitable For Work.

Used when posting a link to a site of dubious merit which could cause embarrassment/P45 if linked to while using the Internet at work

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.

An abbreviation meaning "Not Safe For Work," used as a warning tag for overpaid workers who can browse the internet at work just as long as it doesn't involve swearing or nudity.

Not safe for work
You should never open the file at work if it has 'nsfw' in the name

Not Safe For Work

1) Not Safe For Work
2) Not Suitable For Whiners