Food poisoning obtained from eating a kebab with low-quality ingredients. Can also refer to rapid consumption of kebabs, poisonous or not.
Customer: *vomits, having eaten a kebab*
Kebab guy: AVADA KEBABA!
*later*
Customer: Don't go to this kebab hause if you don't want to get Avada Kebaba'd.
Friend: Avada Kebaba? You must have turned pretty green from that.