Two things:

Well, our friend Charlie's been a-riding on the subway
For a mighty, mighty long time
When his wife went down to the Scollay Square Station,
Why didn't she just hand him a dime?

There's that, and then I used to say "for-get you!" as my ultimate form of dismissal of somebody who wasn't making sense. My fellow camp counselor Joe McCarthy (descendant of Tailgunner Joe) worked for Teddy Kennedy as an intern, and Teddy heard Joe use my phrase. Teddy liked it, and asked Joe where he got it. If Teddy had started using the phrase, I might have been famous.

And my mother had one: "Don't nervous the driver." She'd say that in the station wagon when her five kids were getting hyperactive.

-Joe-