A catering truck, especially one which frequents blue collar places of work; generally a modded pickup truck with insulated diamond-pattern doors covering a refrigerator case and a warmer unit with attached griddle.
"Naw, we wait till the roach coach comes around at 12:15 to take our lunch breaks around here."
the newer, industrial strength roach coach is a mini-restaurant on wheels that is mounted on a truck chassis and is about the size of a UPS truck. Typical coaches have sides that open up to reveal varions snack and beverage items, in addition to an order window where the smiling Hispanic gentleman and his wife/sister or other female cook take and fill orders. Previously confined to construction sites and garages, now the roach coach prowls office parks offering secretaries a fried breakfast and lunch. The call of the wild roach coach is an obnoxious semi-musical horn that calls the willing sheep to be sheared and then fattened up on grease-laden fare.
I 'ate' at the roach coach yesterday and had the trots all night.
When people bring in roach coach food, you can smell the grease all over the building.
Roach coach cooking is the opposite of good food.