P.O.S.

'P.O.S.' refers to something that is a 'piece of shit.' It is usually used to describe an old car, but can be used for other things as well. It is pronounced letter by letter, not as one word.

Example:
-Dude, you really need to get a new car!
-I know! I'm so sick of this P.O.S.!

Fender bender

A 'fender bender' is a minor car accident where someone bumps into another car and causes a small amount of damage. Now that fenders, now called bumpers, are painted the same color as the rest of the car, instead of being black like they used to be, even a little fender bender can be quite expensive to fix.

Example:
-Yesterday I had a little fender bender!
-Did you do any damage to the other guy's car?
-No, just to mine!

Road trip

A 'road trip' is a trip in a car often taken by young people to get to a vacation in another city, such as a trip taken during Spring Break. Sometimes the trip itself can also be the vacation. Road trips often involve squeezing as many people as possible into a car, driving as long as absolutely possible (even all night), eating at cheap restaurants and staying in cheap hotels.

Example:
-I think we should go to Daytona for Spring Break.
-Road trip! I'm in!