Not Safe for Work
NSFW or Not Safe for Work is a subreddit created on 18 January 2006 with almost 4,000,000 members. The r/nsfw forum features NSFW content, i.e. content not appropriate for the workplace. According to Urban Dictionary, NSFW describes content ranging from simple nude photos to explicit pornography. In short, it's content you wouldn't want to be caught looking at at work.