my dh (from AB, Canada) called it nicky-nicky-nine-door (and from the wikipedia description it wasn't racist at all) and in California we called it doorbell ditching.
still wondering how this term is racist...or was it "knock down ginger" you were wondering about? That one, according to wikipedia, was also not racist, if it makes you feel any better...
Most people have uttered a phrase and then had that moment of "OH! THAT'S what that means!
" -- I had the pleasure of using an anti-semitic phrase when I was about 13 right to my jewish friend and being totally mortified when she said "what did you say?" and I rewound...thought for a minute...and then the realization hit me that I needed to start assessing my acquaintences a little more closely... it's an awful feeling!
oh, and hi again Lisa!