Pardon my ignorance, but what the heck does "SAS" stand for? I always say "SAS" when I am walking the mall with my wife, but in my case it stands for "Sweaty *** Syndrome". So, in regards to 4x4 build ups, what is a "SAS"??

Sorry again, but I just gotta ask cause it doesn't make sense contextually with my abbreviation.

Bart