Sign of 'seven'

As said before, youngsters' mischievous ideas sometime come as a surprise to me, sharing a sense of humor. To describe people as stupid is a case in point. Younger generations usually express a guy’s embarrassment by making a ‘seven’ sign with their fingers. But there is something more interesting than it. They turn around their ‘seven’ sign at all angles to illustrate how complete a guy’s stupidness turns out. What’s more, they move the 'seven’ sign from right to left horizontally to show the meaning of ‘stupid again(又seven左)’. I burst into laughter when I learn it.

It is well-known to all my students that I have a ‘classic’ phrase to describe a dullhead. Do you want to know it? I won’t tell! There is something related to ice-cream cone. Ha………………