One thing I stumbled upon in my first job as a working student was the term foo bar. My mentor back then told me it was a fantasy word used as input value without meaning. Just recently I found out that wasn’t true.
In fact the usage he talked about was correct. But foo bar has it’s origins in military and stands for: fucked up beyond all recognition!
Once you get tired of always using the same take a look at this list of acronyms for inspiration. My favourite: fucking ridiculous eating device.