There are two sentences in Badass: Making Users Awesome:
Always close the floog cover before replacing the Y widget.
Well, because the Y widget interferes with the floog's op connector.
What does the floog mean? what is floog's op connector?
This is an example dialog between a technical support person and a (very dim) user. It is intended to demonstrate how to provide good technical support. The dialog is made-up, and the word floog is very made-up.
floog is an example of a placeholder name:
Placeholder names are words that can refer to objects or people whose names are temporarily forgotten, irrelevant, or unknown in the context in which they are being discussed.
I suspect that op is also a placeholder name. Alternatively, given that it qualifies connector, it may be meant to sound a little like an abbreviation for output. Either way, its meaning is not relevant to the principles that the dialog is intended to demonstrate.