Jargon is bullshit? I wasn't aware of that.
In its proper place, jargon fulfills a purpose of conveying specific information related to a task or job setting. I mean, If I tell the junior missile tech to go get me a Kluge, he's off and running with clear instructions. If I have to tell him to go and get the tool that was created by some missile tech years ago to assist in the swift and dependable operation of hydraulic valve override controls, with the name taken from a joke that goes back as far as WWII, at least,' that's going to be the bullshit choice. And a long discussion, delaying the task being performed.
Perhaps he means 'misapplied' jargon? Jargon used in trying to communicate with people not regularly expected to know, understand and/or use the term?
Maybe he just means 'If I don't understand it, it's bullshit.'