Jargon is maddening. Decoding it into plain language is not easy.
Take a few jargon words that are familiar to the group – either sector specific, or buzz words eg. rationalization, downsize, occupational competency, and so on. Write them on slips of paper and put them in a jar. Takes 10 – 15 minutes.
Divide the group into teams. Ensure that everyone is familiar with the concept of charades and ideally give an example to the whole group. Ask each team to take it in turns to come to the front and select at random a word from the jar. The individual then goes back and without speaking, signals to indicate how many words and syllables are involved, then communicates the word or part of the word using mime. As soon as it is correctly solved, the next individual comes up, chooses another word from the jar and so on.