This name comes from the antagonist of Budd Schulberg's novel What Makes Sammy Run? In the novel, Sammy Glick is a heartless go-getter who will stop at nothing to pursue his ambitions, regardless of the consequences to others. Thus, a "sammy glick" is a person who exemplifies these same personality traits. More common names include "glick" and "glickster".
Disgruntled employee: "Yeah, my boss is a real sammy glick. That heartless bastard doesn't care who the hell he has the step on to get his way."