That's those 3 horizontal lines in a stack. I read that term is popular in the iOS community and shows up on a lot of their blogs.
Most places it shows up as 3 dots, in our parlance, that's the overflow button now, was the old menu.
Agree on the tip, that was excellent. Been using Sense 3 years and didn't know that.
I just blocked my wife!
(and then unblocked her lol)