Random idiot: Your name's Tabitha? Whoa, is that your real name?
Me: Yes, it is.
Random idiot: Wow - were you named after that kid from Bewitched?
Me (getting annoyed because this is only the 2,000,000,000,000th time I have been asked this in my life): No, I wasn't.
Random idiot (ignoring the fact that I'm staring daggers at him and ignoring the answer to the previous question): Can you twitch your nose like her?
Me: No, I can't - if I could, you wouldn't be in front of me asking such stupid questions.

Other person walks away in a huff because I refuse to laugh at his unoriginal, uninspired, insipid pop culture reference.

***

Anyway, the answer to your question is "I'm the Tabitha who doesn't twitch her nose", hence No-Twitch Tabitha.