milk truck

noun2

1. •
   (US) Any of several types of truck used for road transportation of liquid fresh milk; usually, a tanker truck for bulk transport; formerly often a stakebody truck to pick up milk churns (milk cans); sometimes a truck to deliver milk bottles for home delivery.
2. •
   (slang, figurative) An unarmored or lightly protected truck-like vehicle, sensitive (fragile, exposed) to damage.

   • You need to protect me: I am only a milk truck.
   • I see a column driving without armor support, only milk trucks.