Cheating on your wife with some Argentine hussy sexpot.
Gov. Sanders of South Carolina was Hiking the Appalachian Trail on Father's Day instead of hanging out with his family.
by djnonsequitur June 24, 2009
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Made famous by South Carolina Governor Mark Sanford, it's a euphemism for when you're doing something nefarious.
Randy: Hey, were you out messin' around with that tranny again?

Daryl: Nah, dude. I was hiking the Appalachian Trail.
by Butler CW June 25, 2009
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Euphemism for sticking it in the butt of an Argentinian woman.
Governor Sanford (R) was furiously hiking the Appalachian Trail for several days over Father's Day weekend.
by ZezAzeZ June 24, 2009
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To have an extramarital affair in another country, especially South America.
South Carolina Governor Mark Sanford was hiking the Appalachian Trail last week and didn't tell anyone where he was, but he's really really sorry about it.
by Ken Starr June 24, 2009
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