Abbreviation for "Not Safe For Breakfast". Used in the same fashion as NSFW ("Not Safe For Work") to indicate a link with content that is particularly unsettling or disgusting. An NSFB link may or may not also be NSFW.
This link is SFW, but definitely NSFB.
Marked For Later. Used on Internet forums to mark a topic of interest to the user that he/she may not be able to view at the current moment (i.e., the user is at work and the topic contains a link that isn't safe for work).
By marking the topic with a post, the user can go back later and, usually by using a "My Latest Posts" feature, view the content.
Topic: Nekkid JAlba Pics
Poster 1: *fap* *fap* *fap*
Poster 2: At work... mfl
What results when pornography is posted somewhere, often a message board, that is purportedly worksafe (e.g., The New York Times homepage).
Many might think that the appearance of such material on a workplace monitor would lead to firings or at least a stern talking-to. But in one of life's little mysteries, 4chan's /v/ discovered that most employees are actually promoted instead, perhaps in approval for their viewing such interesting internet content.
Poster One: I know this is a tech website, but I had to share these great photos of Jenna Jameson.
Poster Two: I just got promoted!
Naked shops of Jessica Alba in my work inbox? PROMOTIONS
Not Safe For Dorm. Generally used to describe content that could be offensive to a dormmate, usually sexual or gruesome in nature.
Deon: <insert website here>
Not Safe For Lunch. A warning that linked content is sufficiently horrendous as to be sensibly avoided by the weak of stomach.
This website|image _link_ is NSFL.
Not Safe For FormerGolfer's Bed. Used to denote seemingly appropriate material that would not be safe for redraidersports.com's subscriber FormerGolfer's wife to see in bed.
Example- OT: Women in Burqas (NSFFGB)
Not Safe For Your Work. A variation of NSFW, reflecting the varying degrees of acceptability of sexual or violent Internet content in different workplaces. What is inappropriate for one person's office Internet browsing may be just fine for someone else. Related to PNSFW (Possibly/Probably Not Safe For Work).
Check out this site (NSFYW).