OK...anyone else had a problem like this. Was just walking up the stairs now, and stubbed my toe....which is doubly painful as I have an ingrowing toenail too. In the middle of a burst of swearing I accidentally put the word quack...and I have no idea how this came to mind. The sequence was:

S**t, Fu*k, bo***cks, quack.

Only think I can think of is that I was trying to say "wank" but missed it somehow. My housemate just looked at me and said "Quack?". Any suggestions?