I was NEVER allowed to use "you know" as verbal punctuation ( as my Papa the Enlish Lit Professor called it) while at home. But I have other bad speech habits.
The worse is probably "Oh my!"
Next would have to be "Oh really?"
And finally, "Do you rally think so?" all delivered with a certain amount of sarcasm.
My other verbal sins are "Yikes!" and "Shitski!" both meaning the same thing. I just use one or the other depending on who is listening.

There are other things I say to overuse, but they are more... well, they don't occur other than in private, (usually)

WW

__________________
"I wondered, am I a lesbian, am I straight, or bisexual? Then I realized that I am just a slut.
So where's MY parade?"

---Margaret Cho