More good jargon
SPOF == Single Point Of Failure, a system where, if one component (and it could be one particular component, not any one component) fails, the entire system fails. An example is MS Outlook's monolithic .pst mail file; if any part of that file is corrupted, all of your mail is just entropy on the disk.
In another context, SPOF is Spousal Piss-Off Factor. "I stopped watching college football because the SPOF was too high."
[Here I should note in the name of honesty, since not everyone actually knows me, that I never started watching college football, nor do I have a spouse. At least, not that I'm aware of.]