I'll copy my response to the other person who was also confused by the reference:
In America, there's a very popular car windshield decal sticker that people put on that says "Salt Life." It specifically just means someone visited a popular beach vacation spot called Myrtle Beach, SC. The people who put it on tend to being almost exclusively sporty douchebags and suburban moms.
Most folks in the central US who want a beach vacation drive down to Floribama. Most if not all Salt Life stickers from Iowa, Illinois, Indiana, Missouri, Kansas, Arkansas, western Tennessee, etc are born in the Florida panhandle.
My wife and I are from the midwest and laugh at all the sLuT LiFe stickers on Jeeps nowhere close to the ocean.On a trip to Jacksonville Beach there was a spinoff restaraunt which was like Hooters had a baby with the Gap.