Slapping your hands together with a homie to shake hands.. But not the normal way, its a series of movements that would be hard to explain. You will know it when you see it.
Used extremely often in Saskatoon's WestSide
KaZ: Man i ran into like 16 bro's the other day and gave every single one a "bro shake".
Mac: That's respect homie....
KaZ: Who the fuck is this kid?
Mac: I don't know, but he looks like a chump...
(No "Bro Shake" offered to the chump kid.)