Like Wanda Maximoff
I'm taking an informal poll. Did you, as a child (or, you know, yesterday), participate in the ritual of "jinx"-ing? In my experience, this happened when two persons said the same word or phrase simultaneously. The first person to complete the incantation of "jinx" effectively cast a spell of silence over the other, only to be lifted when the jinx-er spoke the jinx-ee's name.
An example, for those who are completely unfamiliar; Miriam and Douglas (honestly, Mr. Lain, they're just the first two names that popped into my head) are talking, and both utter the phrase "We be illin'" simultaneously. Miriam quickly says "jinx," and by playground law Douglas is now unable to speak until she says his name.
What's interesting to me are the elaborations and variations. When I was young, it was the incantation that acquired new parts; following the "jinx" one had to say "Knock on wood," followed by the name of a beer ("Schmidt," a local St. Paul brew, was the default choice), "Buy me a Coke" (I think it was kosher to say any soda/pop, but Coke is easiest to say), and eventually there were other additions which I have forgotten. To release the jinx-ee, however, we had only to say the person's name.
This, however, is only a snapshot of the ritual in one suburban Minnesota school district. I want to know about your regional variations, please! And yes, this might be research, but I'm also gen-yoo-wine-lee interested. So please comment below!