There's More to Business Jargon than Meets the Eye
I suspect meetings at most American companies are full of jargon. There’s company- or industry-specific jargon: abbreviations or nicknames for common ideas (sometimes this is extended to the naming of internal teams as well). While frustrating to newcomers, these terms and phrases typically have a fair amount of value. Shorthands for industry-specific concepts are useful, both in time savings and added precision.
A good example is MAU, monthly active users. Investors care a lot about who is using a product regularly, so this probably comes up regularly in Silicon Valley communications – both with the investors and within a company, as leadership pushes MAU as a proxy goal.