Fans of the Dr. Seuss classic children's story Yertle the Turtle may appreciate the idiomatic use of "the turtle at the bottom" or "the turtle at the bottom of the stack" as an alternative to "low man on the totem pole." In Yertle the Turtle, King Yertle demands that the turtles in his pond stack themselves up to form a throne befitting his high and mighty status. Ultimately, Mack the turtle at the bottom of the stack topples the throne and overthrows Yertle—by burping.
The same idiom also suggests the undesirability of being the bottom-most turtle in the stack suggested by the idiom "turtles all the way down."