When people get up in a meeting and start explaining something - to avoid looking nervous they start moving their weight from side to side on their legs, and make gestures with their hands. That's called the boardroom shuffle.
***Big meeting takes place - Annie has to speak and is nervous***
Dude 1: "Yo, what is up with Annie up there? Is she having a fit up there?"
Dude 2: "I think it's just a classic case of the Boardroom Shuffle"