Well as far as insider lingo goes, theres the penguin diagram when you're doing Feynman Diagrams. The story of it's naming via Wikipedia:
John Ellis was the first to refer to a certain class of Feynman diagrams as penguin diagrams, due in part to their shape, and in part to a legendary bar-room bet with Melissa Franklin. According to John Ellis:
Mary K. [Gaillard], Dimitri [Nanopoulos] and I first got interested in what are now called penguin diagrams while we were studying CP violation in the Standard Model in 1976... The penguin name came in 1977, as follows.
In the spring of 1977, Mike Chanowitz, Mary K and I wrote a paper on GUTs predicting the b quark mass before it was found. When it was found a few weeks later, Mary K, Dimitri, Serge Rudaz and I immediately started working on its phenomenology. That summer, there was a student at CERN, Melissa Franklin who is now an experimentalist at Harvard. One evening, she, I, and Serge went to a pub, and she and I started a game of darts. We made a bet that if I lost I had to put the word penguin into my next paper. She actually left the darts game before the end, and was replaced by Serge, who beat me. Nevertheless, I felt obligated to carry out the conditions of the bet.
For some time, it was not clear to me how to get the word into this b quark paper that we were writing at the time. Then, one evening, after working at CERN, I stopped on my way back to my apartment to visit some friends living in Meyrin where I smoked some illegal substance. Later, when I got back to my apartment and continued working on our paper, I had a sudden flash that the famous diagrams look like penguins. So we put the name into our paper, and the rest, as they say, is history.
The conductance of an object (that is to say the inverse of it's resistance, which is measured in ohms and has the symbol omega) is traditionally measured in mhos (ohm spelled backwards) and has the symbol of an upside-down omega.
As far as jokes go, this one will be funny to all you Physicists out there, but not so much to everyone else.
So one day Zog, a caveman, went into see the doctor as he was becoming quite concerned about his health.
Zog: Well, it seems that everyone else at work is changing but me.
Doctor: How so, can you describe their changes?
Zog: Well, they're all standing up straighter and becoming less hairy are the biggest ones.
Doctor: Well, maybe it's something about where you live, do you live apart from all your co-workers?
Zog: No, my friend Ug lives in Shelbyville with me, and he's changing along with the rest of them.
Doctor: Well, maybe it's how you get to work, do you and Ug drive together?
Zog: No, he and I work different schedules, I get a ride in with another friend, Thag, who lives over in Hamilton.
Doctor: Well there's your problem.