Backpack

Etymology
back + pack

Noun

 * 1) A knapsack, sometimes mounted on a light frame, but always supported by straps, worn on a person’s back for the purpose of carrying things, especially when hiking, or on a student's back when carrying books.
 * 2) A similarly placed item containing a parachute or other life-support  equipment.

Synonyms

 * knapsack (US)
 * rucksack

Verb

 * 1)  To hike and camp overnight in backcountry with one's gear carried in a backpack.
 * 2)  To engage in low-cost, generally urban, travel with minimal luggage and frugal accommodations.
 * 3)  To place or carry (an item or items) in a backpack.