dolly

Freddieは主人公の義父ですが、酒癖が悪く、しょっちゅう暴力を振るうので、まだ少年の主人公は殺したいとまで考えるようになります。
Shortly after Baby's warning, a golden opportunity for him to suffer a freak accidental death was given to me when Freddie and I went to move a refrigerator into her house. Barking orders, Freddie told me to go in front and pull the dolly up, while he took the position below, pushing the dolly and the refrigerator up the staris.
"dolly" は人形を思わせる響きがありますが、重い冷蔵庫を動かすのに使用する物の様です。辞書を引きます。
・Oxford English Dictionary: A small platform on wheels used for holding heavy objects, typically film or television cameras.; Nearly a quarter of the film's movement - dollies, crane shots - are synthetic.
・Merriam-Webster's Online Dictionary: a piece of equipment that has wheels and that is used for moving heavy objects: We'll need a dolly to move the refrigerator.
"dolly" が何故この様な意味を持つようになったのか不思議なので調べたところ"Word Detective" に次の説明があったので引用します。
And somewhere along about 1900, somebody decided that a small wheeled platform looked sufficiently like a doll (perhaps only in comparison to larger wagons and trucks) to be called a "dolly." Dollies have been with us ever since, one of their most important modern uses being to allow TV and movie cameras to be easily moved about.