I heard a perfect example of this just the other day when speaking to a security bod in a bank.
I searched the term in DuckDuckGo and found no definitions, though I found two "Inquirer" headlines that use the same phrase:
Linus Torvalds slams Google security bod's 'bullsh*t' approach to bugs
Security bod uncovers 15-year-old macOS zero-day flaw
I also found UK's "The Register" using the term in a headline.
What does this term mean and is there any etymology for it? (Neither "body" nor "board of directors" fits the context.)