Dear Miss Manners:

What does NSFW mean?

Signed,
Curious and Clueless

Dear Curious:
hmmmmm  Let's see.... The meaning of this acronym will likely be more easily determined if I knew the context it was used. It could mean one of the following:

Now Show Friends and Workmates
Not Suitable for Women
National Schools Film Week
 It most likely means  -  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)."  Source: Urban Dictionary

So, Curious, beware when you receive email from a friend that is labeled NSFW if you want to stay in the good graces of your employer.

Sincerely,

Miss Manners