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1.
noun: increased anxiety and tendency toward error experienced by the user of a computer or other interactive electronic device, caused by the presence of an observer or observers, and directly proportional to the number of observers, the importance of the personal and/or professional relationship of the device user with said observer(s), and/or the nature of the device content or device user's activity
1. "When my boss stopped at my desk to watch me type up that memo I got serious typefright. I made all sorts of mistakes I wouldn't usually make."

2. "Sorry about the weird message; I got typefright when my boyfriend sat down next to me while I was texting you about his surprise birthday party."
by junglelinguist January 15, 2011