From The Railroad Caboose by William Knapke we have the following:
" Among the picturesque terms that boomers coined to describe the caboose are ambulance, anchor, buggy, brain box (the conductor was often called "the brains"), bazoo wagon, chariot (this word more often designated an official's private car, technically a business car), crummy (very common), cripples' home, den , diner, glory wagon (men killed in train wrecks, caboose or otherwise, "went to glory"), go-cart, hack (very common) kitchen, madhouse, monkey cage or monkey hut(also many other kinds of cages, mostly derogatory), palace, parlor (rear brakeman was "parlor brakeman" or "parlor shack"), perambulator, rest room, treasure chest, and zoo - plus some terms that are not printable."