Query: Spitting in "My Big Fat Greek Wedding."

[Kim & Rima McKinzey]

>... "Pooh pooh pooh" is a
>good verbalization of what I called her "mock spitting". Neither my wife
>nor I do it...

Exactly.  My parents didn't do this, but my aunt did, and so does my
cousin, her daughter.

>... "knock
>on wood", after mentioning an undesirable possibility.

??  I've only used it, or heard/seen it used when it meant,
essentially thank goodness - not an undesirable possibility.

Rima