The phrase 'car squashed' is grammatically correct and usable in written English.
For example, you could use it in a sentence like: "The truck hit the car and totally squashed it."
The truck folded around the car, squashing it into the shape of an arrowhead.
A study in the UK reported in 2004 that a postcard-sized area of the front of a car squashes into one insect for every 5 miles (8.0 km) driven.[10] A similar study in the Netherlands in 2011 found one insect squashed on a license-plate-sized area of the car for every 3.1 miles (5.0 km) driven.[11].[11]
Boo Radley camped until April, when two police officers passing by in a car got out, squashed his box and threw it into a garbage can with the blankets.
Nearby, sleeping mats and draperies hung between slabs of concrete and a ruined satellite dish sat near squashed cars.
Hats were knocked off when you entered a car and inevitably got squashed beneath a passenger's wayward behind or went into orbit when you lowered the top to a convertible.
Once he and his friends were stopped by the police in a Mini Metro – there were five boys and five wheelchairs squashed into the car.
You don't have to push your way onto an overcrowded subway car only to find yourself squashed next to someone who smells or elbows you.
In fact, so many buses are jockeying for space that someone in a car is likely to be squashed or rear-ended if he takes his eyes off the road even for a second to try to read the baffling array of signs.
Next stop was to be the Uzbek border and we pushed on through the night squashed into the cars to make the border for the following day.
Instead of being squashed into a cattle car with other terrified recruits, I was now in a van touring the huge installation at my leisure.
The buses aren't much better since they're prone to randomly squashing cars.
