Jargon familiarity is something that should improve as you get more experienced, but even veterans will run into jargon problems sometimes -- not just at interviews, but as part of daily interaction with clients and even team members.
The most important skill for such cases is the ability to ask for clarification. Even if you think you should know the answer, you need to learn not to let that stop you. Even if you think you probably do know the answer, you might want to consider asking anyway, to make sure you're tracking properly -- misunderstandings can be costly.
Learning to ask such questions gracefully will come with practice, also, but that is a skill of secondary importance...
As part of the basic research that is helpful before any interview, you can try brushing up on jargon relevant to the particular job. However, I would not advise giving much effort to or reliance on such cramming, as that kind of knowledge is shallow and fragile. Other elements of such research (such as what the company does) are likely to be more important.
Finally, if you feel you need a general refresher on CS101, you have a couple of options. You can go to the library (or to Amazon, or the Internet), locate a good text or three, and do some self-study on whatever subjects you feel weak on. Or, you could look into some local institution that offers continuing education, and actually take a refresher CS course or two.