29th December 2020
Answer: ‘Greeting’. 5 x 5 are high fives with the hands, with 5 digits on each hand (if you are human with the usual number), seems OK to me.
Or handshake when you cross the arms as it were, your right hand to the other person’s right hand. I hope you do remember what a hand shake is? That friendly thing we used to do before anti-social distancing? You do, vaguely?
If not try this which is great fun, but complicated.
Or this which is technical.