initially coined and used in comedy routines by Michael Lester and John Russell in 2012, "shemping" is a term commonly used in the Twin Cities comedy scene.
Term coined by director great, Sam Raimi, referring to actors who stand in for those that aren't currently available. Usually dubbed in and with the back facing to the camera.
Bruce Campbell is sick with the flu, just put a fake shemp in for that last scene he needs to film...