If you grew up in the nineties, this will be familiar to you.
Three lines, three lines, then connect them diagonally.
You have almost certainly seen it, and you have very probably drawn it.
But you don't know what it is. Nobody seems to.
I remember being taught in detail how to draw them (apparently there was a special order to draw the lines and you weren't cool if you didn't do it right).
I was never cool and so mine always ended up being 8s.