"I thought about using a static framework like Octopress or Jekyll-Bootstrap so that I could write in vim and commit and push from the terminal, but then I realized it would be a pain to blog from the remote so I cloned this repo on GitHub to hack Wordpress to run on Heroku for free using PostgreSQL", I responded casually to my roommate this summer, a fellow hacker/scientist, when she asked me what platform I would be using to start my writing blog.
My sister, a "normal" human being used to answers like "Blogger" or "Wordpress", overhearing our exchange on Skype, laughed and said to me, "You guys are literally speaking another language. It's like hearing robots talk or something."
While I don't think I'm quite on the level of R2D2 (at least not yet), I am aware of how much like gibberish it can sound when you catch me in animated discussion with another CS-er about some software or algorithm. One minute English, the next minute we hit some topic, and boom, off we go rattling off in Nerdspeak.
And although Computer Science is definitely one of the more jargon-y fields, thanks to its highly technical nature and the extreme "in-group" culture, this phenomenon is not limited to the subject.