"Dar un toque" in Spain, grew up with it as well haha
I remember doing it with friends, girls I liked... it's interesting how we're constantly looking for ways to communicate.
„Puścić strzałkę” (to send/drop an arrow) in Polish. Also sometimes called „puścić sygnał (to send/drop a signal), „puścić dzwonek” (to send/drop a ring), and other variants.