A childhood belief about adverts

In northern California, there's a car dealership owner named Cal Worthington. The jingle for his commercials (set to the tune of "If you're happy and you know it, clap your hands"), was something along the lines of,
"If you want a car or truck, go see Cal!
If you want to save a buck, go see Cal!
If you want a brand new truck, if you want to change your luck, if you want to save a buck, go see Call!"

I, like the majority of kids my age, though he was saying "Pussy Cow".

I thought it was some sort of expression that meant "tough luck", as in, "you want a car? Well, tough, because you can't have one".