Can I ask my waitress for my tips back?
Why ask for the tip back?
Because she's so rude. She's ignoring me even though I didn't receive my food yet.
I do not think that you should do that. It is wrong to ask for a tip back. Although I do wonder why you've already tipped if you haven't gotten your food yet.
I'm a jerk, I don't care.
If you gave a tip already then it is theirs to keep. You should just leave and let it go. Servers rely on tips and it doesn't seem worth making a scene to try to get yours back.