Not Safe For Life. Stuff that isn’t appropriate no matter where you are, how old you are, or what time it is. NSFL content is usually gore. Examples of NSFL content include: Goatse, kekma.ga, a lot of videos on Liveleak, 1 Guy 1 Jar, 2 Guys 1 Hammer, etc.
A term used in the mobile phone industry to describe when you take something that is not broken and change it and in the process of changing it you break it because you are a giant dumb ass!
Well he really nstled that project, thats why everyone is out of a job.
Well the pacemaker was working fine till you decided to nstled it, now Dustin is dead, good job Andy.
This word well letters are used on the Blackberry handset, after broadcast messages from your contacts they will normally put NSFTBC which means 'not sorry for the broadcast' and the other one is SFTBC which is 'sorry for the broadcast' so these words are ONLY used on the Blackberry for any Blackberry people who hold this smart-phone.
A girl just died today in a car aciendent send this around to showhow much you care. - NSFTBC
Acronym meaning "Not Safe For This Site", which means that the content that it is directed towards is not appropriate for posting on a website or forum within due to content regulations.