" Shave tail " was a term originally used in the 19th century among U.S. cavalry regiments. Newly assigned cavalry troopers were given horses with a shaved tail, to let other troopers know that the rider was dangerously inexperienced, and should be given extra room to maneuver during training. " Louie " is a nickname for lieutenant, the lowest ranking, and least experienced, rank among U.S. Marine Corps officers."
In Avatar, "Colonel Quaritch mentions that being on Pandora made him feel "like a shave tail Louie."
by Kiwi.baby September 8, 2017