To have a sexual encounter or affair, named after the infamous disappearance of South Carolina Governor Sanford, originally thought to be hiking the Appalachian Trail, but was having an extra marital affair in Argentina.
I wanted to Hike the Appalachian Trail in the back seat of my dad's Lincon after prom, but my date wasn't drunk enough.
by scexpat June 24, 2009
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I was out "Hiking the appalachian trail"
by Spartan1986 June 30, 2009
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Governor Sanford can't meet with you today; he's "hiking the Appalachian Trail."
by SkidMarkyMark June 25, 2009
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a word used to describe someone who cheats but tries to cover it up.
You: Hey did you hear about that governor from South Carolina?

Friend: No, what happened?

You: He got caught "walking the appalachian trail" with a chick from Argentina.

Friend: Oh snap.
by campbelluniversity June 24, 2009
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A poorly executed secret tryst - that isn't a secret to anyone.

It is a reference to the disappearance of South Carolina Governor Mark Sanford who "disappeared" for a week to Argentine on a romantic escapade. His staff and office told the news media that he was "hiking the Appalachian trail."
Dave needs to take a break from hiking the Appalachian trail with his secretary and get some work done!
by Walking Stick June 24, 2009
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