That reminds me of one. I used to work in telecommunications (and am desperately happy to be out), and the tech guys had a term: NAT.
Context: When pitching something to the executives, or when designing dumbed-down descriptions for the marketing or sales teams, NAT would be used in critiquing the material. “NAT” stands for “Not Another TLA,” wherein of course “TLA” stands for “Three-Letter Abbreviation.”
The salesmonkeys and execs just loved using jargon to make themselves sound like the experts they weren’t, so the engineers and tech support people would sarcastically add to the margins of draft white papers: “Needs more NATs.”