Nay23- Tan will remember me in our thread how i asked about this. Annabelle did it and still does it sometimes! I find its when she is frustrated, trying to get her point accross and usually tired!

I ignore it, if Im holding her at the time, I put her down and say "I dont play with those who hit."
She cant understand me but she seem to get the point. She has really stopped doing it as often and only very rarely does it. Its hard for bubs they cant express what they want with "correct" words. So its a frustration thing, not a nasty thing