look up any word, like cunt:
 
1.
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.
by ErWenn November 18, 2006