Derived from the baseball WAR rating, the GAR rating stands for girls above replacement. A GAR rating can be assigned to anything from a new article of clothing to a new car and basically describes the amount of girls that you will now get with every year that you wouldn't have gotten without it.
These new pants are sweet...the GAR rating is at least 2.0
Dude why would you sell your car? It had a 5.0 GAR rating
That sweater has a GAR of like 20. I just popped a boner