2000 Miler - Either a thru-hiker or a section hiker who has hiked the entire Appalachian Trail.
A.T. - Appalachian Trail.
Bald - A mountain with no trees on top.
Bearbagging - The practice of storing anything that smells like food or
contained food (as well as the food itself) in two bags, and hanging them over a
tree limb that a bear can't reach by climbing or stretching. Other items that
must be put in a bearbag include toothpaste, soap, deodorant, and scented
Blowdown - A fallen tree across the trail.
Day Hiker - Carries very small or no backpack.
Flip-flopper - Hikes part of the trail going south to Springer Mountain, (or north to Mount Katahdin) then returns to starting point and hikes north to Mount Katahdin (or south to Springer Mountain).
MUDS - Mindless ups and downs. Usually refers to a short section of the trail that is particularly tough.
PUDS - Pointless ups and downs. Usually refers to an extended section of the trail that is particularly tough.
Purist - A hiker who decides to pass every single white blaze on the A.T. Many hikers choose to take alternate routes, marked with blue blazes, because they may offer an easier terrain or better views.
Section Hiker - Attempts to hike the entire Appalachian Trail in a series of connected hikes.
Slackpacking - Walking for a day without your backpack. Typically, someone
drops you off at one place in the morning and picks you up somewhere else later
in the day.
Stile - A set of steps for passing over a fence or wall.
Thru-hiker - Attempts to hike the entire Appalachian Trail in one continuous hike.
Trail Angel - A kind-hearted individual who performs a good deed (for example, gives a ride into town or back to the trail) for a hiker.
Trail Appetite - When you burn 1500 calories an hour hiking, you can eat anything
you want and still lose weight.
Trail Magic - A tradition where food is prepared and served as a pleasant surprise to hikers as they come along the trail.
Trail Name - The new identity A.T. hikers assume while on the trail.
Trail Register - Usually found in shelters, hikers use these notebooks to write messages for others who will come after them.
Yogi-ing - Asking other hikers for food.
Town Gut - Temporary condition that occurs when hungry hikers spend a day or so in town tracking down all the food (pizzas, subs, burgers) unavailable on the trail.
Weekender - Out for 1 - 4 nights. Carries backpack but is usually wearing jeans or other non-thru-hiker clothing.
Zero Day - A no-hiking day.