I so agree with Taesma.
My boss at work has about half a dozen pet phrases at work which he uses and expects as to find them amusing every time.
One especially bothers me because it is so rude.
"Build a bridge and get over yourself"
I mean it is just another way of saying "shut up, what you are saying is unimportant and of no interest"
Now I will admit to finding it amusing the first time, by the 50th it was quite aggravating.
His other trick is talking in acronyms like TTFN and POETS day.
Oh and I agree with just about everything else everyone has said too, especially the escalator comment.. and I will add on to that one as well and my mother is some one who does this and that is people who stand on the left side of the escalator and don't move when we all know that's the overtaking side (I think it is different in other countries).
And last of all people who don't use punctuation or construct their sentences properly...