there are actually only two ways to say hello. The first way is through verbal communication, the second is physical communication. there are many different words used to say hello, no matter how many different words you use to say hello you are still engaging in a single action. This is the same with the numerous possibilities in physical greeting. Nodding your head, waving your hand, or slapping an ass is one action performed differently numerous ways.
My favorite way is squeezing my nipple, while screaming "i love nipples, wanna be my nipple buddy?"