This came up on Facebook. The reason for the title is that I sent it to my motoring friends where a Trolley Dolly (sexist remark) is usually their wife wheeling a trolley holding the battery for starting the car on the start line
I've only ever heard the term "trolley dolly " to refer to the flight attendant (or train attendant) who pushes the snacks/drinks trolley up and down the aisle!