What do you call the act of greeting someone with a series of hand gestures? This is something you would see, e.g., between gang members.
For example, when two people meet, they give a "high-five" to each other, and then gently push their knuckles against each other, and then touching their elbow against each other.
In an example sentence, I would love to say:
I have just seen those two _________ing.
The expression ``victory dance'' comes to my mind, as describing a specific series of body movements, but that is obviously used for something else. I am sort of looking for an analogous expression.