Vanbulance
The "van-style" ambulance. Not the typical modular body style ambulance. Vanbulances are often seen in crowded city environments where larger ambulances would have difficulty negotiating traffic, etc...
Not only are vanbulances fuggly (that's frigging ugly) the patient campartment is extremely cramped.
Vanbulance
An ambulance which has been retired by the city, sold at auction, bought by someone, and had the ambulance guts ripped out of it - a.k.a. - a van that was an ambulance at one point.
"I waste all my money at the pump when I drive my vanbulance to school every day."