Beware when using jargon; look out for quizzical facial expressions or surprised gestures in your audience. Invite queries; say something like, “Does that make sense?”, or “You look like I’ve said something you don’t understand?”
If you hear unknown jargon, you can wear a surprised expression, or try:
“I’m not being funny, but what does …. mean?”
“At the risk of seeming ignorant, can you explain what you mean by… please?”
Try and say these questions in a light-hearted tone of voice.