Not too many things said to me, but I've said some spectacularly stupid things at work:

Top of the list has to be when bemoaning the fact that Mark disapproved of the whole "office christmas party" culture "Oh - does he think I'm going to suddenly be like a butterfly bursting out of its clitoris?".

Or - when waiting a long time for the lift (elevator) "This is taking so long - I only want an up lift".

And another time, when I remarked to colleagues that they were talking rubbish because it was a "fallacious concept" (guess what they thought I'd said).

Funny how its the rude ones that stick in my mind...

Kris