In the Navy, a Mustang is an Officer who has promoted up from the ranks of Navy enlisted personnel through an in-service procurement program, with no interruption of his/her active duty status. It is also understood that the Mustang Officer was a career Sailor, and normally wears one or more Good Conduct Medals.
It literally refers to the mustang horse, which is a wild animal and therefore not a thoroughbred. A mustang, after being captured, can be tamed and saddle broken but it always has a bit of wild streak, and can periodically revert to its old ways unexpectedly and therefore the owner needs to keep an eye on it at all times.
By the same token, however, since a mustang was formerly a wild and free animal, it may very well be smarter, more capable and have a better survival instinct than thoroughbreds. The mustang can take care of itself when things get tough, thriving on rough treatment, while the thoroughbred, having been pampered its whole life, cannot.
Wow. Very nice. I think that the wild animal reference is the best. It suits our stangs perfectly givin our never-dying need to peek back/or walk backwards when walking away from the beautiful things just so we can see them a little bit more. HAHA, speaking of which. I almost got ran over in the walmart parking lot while walking backwards and admiring my car.
What is a Mustang? 
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