Euphemism used mostly by politicians for spending time with a South American mistress, most commonly Argentinian.
Sorry I didn't call, dear. I was busy Hiking in the Appalachians and couldn't get phone service.
by capt. planet June 24, 2009
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Claiming you are going "Hiking in the

Appalachian Mountains" for vacation when in fact you are going away for a booty call.
Bob: Yeah, I'm burnt out. I'm going Hiking in the Appalachian Mountains for some R&R.

Frank: Dude, who are you kidding. I saw you and Sally from the copy room groping each other in the bar. You're headed to a Motel 6 for a few days
by Langbo June 25, 2009
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