in Italian, it is simply onomatopoeia, imitating the sound of glasses clinking...in Japanese, name for body part the fellas have that the girls don't.
Didja know that the tradition of clinking glasses comes from a time in history when poisoning at the round table was popular? In response to the problem, when local leaders met together everyone was required to pour a bit of their drink into the next guy's chalice, that way, if anyone was poisoning, everyone would be poisoned..clinking glasses was a way of saying, not to worry, I trust ya.