fscking
/fus'·king/, /eff'·seek·ing/, adj.
[Usenet; very common] Fucking, in the expletive sense (it refers to the Unix filesystem-repair command fsck(8), of which it can be said that if you have to use it at all you are having a bad day).
Originated on scary devil monastery and the bofh.net
newsgroups, but became much more widespread following the passage of CDA.
Also occasionally seen in the variant "What the fsck?"