To travel to Argentina to bang your mistress, while your gubernatorial staff back in South Carolina lies to the press about your whereabouts (see Sanford, Mark).

To cheat on your wife.
"Jane filed for divorce when she caught her husband hiking the Appalachian Trail with the babysitter."
by Palmetto Ghetto June 24, 2009
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Spending time with your mistress.
"Where are you going, Governor?"
"I'll just be hiking the Appalachian Trail with Lupe for the next few days."
by hayes6 June 24, 2009
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What you say you did when you come back from being missing for several days in order to hide what you were really doing.
"Jim, why haven't you been at work the past 3 days?" "Oh, I thought I'd... uh... hike the Appalachian trail!"

"Bob, why did you come home late last night?" "Oh I thought I'd hike the Appalachian trail on the way home!"
by SonOfALink June 24, 2009
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The Governor of South Carolina had an affair with a woman from Argentina. As his cover story he told everyone he was hiking the Appalachian Trail. To sum it up it is slang for having or having had sex.
"Hey have you seen Mark?"
"No but I heard he's with his girlfriend behind the bleachers. They're hiking the Appalachian Trail"**winks**
"Oh that dirty bastard."
by ashesfallingdown June 25, 2009
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Code used by persons who claim to be participating in vigorous, solitary outdoor activities to escape stress when in fact they are carrying on hot and heavy clandestine affairs in foreign countries (preferably located in South America).
On Saturday, Jenna tried six times to get in touch with her boyfriend, Mike, but he had already told us he was hiking the Appalachian Trail this weekend so we knew his phone would be off.
by SCtransplant June 25, 2009
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A euphemism for a mysterious disappearance as a result of illicit activities.
Disappear for a few days and need an explanation? "Sweetie, I was just 'hiking the Appalachian Trail!'"

Boss asking for a note on why you were out for a four-hour lunch with his wife? Yep, you guess it - you were out hiking the Appalachian Trail!

See also Sanford, soon-to-be-former Governor of SC.
by thecovert June 25, 2009
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To have an affair with a woman/multiple women, preferably from Argentina. Email is the main form of communication, although in this case, an actual visit is needed.
Press: Where is Sanford?

Joel Sawyer, Sanford's spokesperson: Uhh...He's... Hiking the Appalachian Trail...Yeah, that's the ticket.
by kneenuh July 13, 2009
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