What old people do from the porch when little kid's baseballs break their windows.
Those little rat bastards broke my kitchen window again, so I gave'em the old fist shake from the porch to scare them off.
A staple Old Folk agressive move. Shaking the fist lets people know they are disgruntled but haven't the means to kick your ass. Directly related to the wave off
, the fist shake is a time honored right for senior citizens, and adored by the young.
When I burned out in front of Old Man Stephens house, he gave me such a fist shaking that I thought he was gonna bust a jugular.