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"Not For British School Kids"

Uses:
1. In place of a swear word
2. Describing a topic that is obscene, disgusting, or in general "not for kids"

Origin: Circa 1998
At the snopes.com message board, an obviously irate woman posted saying the other posters should watch their language, because there were British school children reading the message board. From then on, as a joke, the other snopesters started using NFBSK in place of swear words or in the subject lines of topics that might not be suitable for children (or the squeamish).
1. I moved one Jenga block and the whole NFBSKing thing fell down!
2. I'll tell you about my surgery, but I must warn you, it might get a little NFBSK.
nfbsk by birdman August 4, 2004
Related Words
NFBSM nfbsk nfsmw
Another game in the nfs mw means most wanted, realeased in the 4th quarter of 2005
dude1: I'm the best nfs player in the world
dude2: U can't beat me in nfsmw
nfsmw by WalMo January 9, 2006
Acronym: Not For British School Kids

Created on the snopes.com message board. Can be used in place of a curse word, or to describe something as inappropriate.
I don't need your NFBSKing attitude!
Man, this topic is a bit NFBSK.
nfbsk by NuclearMosquito July 29, 2004
Not For British School Kids
Meaning obscene or adult in nature.
Also used to censor somthing.
"She kicked the NFBSK out of that guy."
"Um, I don't think johnny should see that movie, its kinds NFBSK if you know what I mean."
nfbsk by ditto September 13, 2003
NFBSK! That post in the NFBSK forum in really NFBSKed up!
nfbsk by DarkDan October 10, 2003