"Fucknodge" is one, which I invented by accident. Used as a term of derision or exasperation.
And "oh please" is the other, aimed at just about everything.
I'd also like to get FFS as a numberplate for my car, as according to my work colleagues I say it (in full, not abbreviated) all the time.
I'm also prone to "awesome" and "pretty much", both of which I picked up from a friend. "awesome" for me has pretty much replaced "yes / ok / sure / any term of appreciation" in my vocabulary, to the point where I don't even realise I'm using it.