Possibly a variant of shotgun, shotknobs means that you call something. Basically, you say "Shotknobs ________!", with the line being the thing you want to call. Shotknobbing can be reversed by yelling Moses, although that can be prevented by adding "No Moses" to your shotknobs. I'm not quite sure of the origin of it, although it may or may not be related to shotgun.
by Patrick Sovereign January 31, 2007