A somewhat thread-creepy comment on words coming from acronyms: near my hometown in Michigan there's a small town named Novi, the name of which supposedly derives from its being the number six stop on the Detroit-to-Lansing stagecoach line...No. VI. Don't know if it's true, but it's a good story.
On the S.H.I.T. subject, there's an e-mail that occasionally makes the rounds about Specialized High Intensity Training. It's pretty lengthy, and pretty funny...if you're not getting enough S.H.I.T. you can request more, that sort of thing.