Painful, sore, red gums can be a symptom of gingivitis (inflammation of the gums) or, more likely, periodontitis (inflammation of the attachment fibers of the teeth and supporting bone), which can arise due to a number of different causes.
klick (plural klicks) ( 1 slang, military) A kilometer. 2002, Robert J. Sawyer, Hominids an asteroid between one and three kilometers wide had slammed into the ground at fifteen klicks per second. ( 2 slang, usually in the plural) Kilometres per hour.
A: In many military-related movies and television shows, characters describe distances in terms of klicks, causing many people to wonder what a klick (also sometimes spelled click, klik, or clic) is. This term is shorthand/slang for a kilometer. We found its definition in several on-line glossaries, including this Glossary of Words used by CAP Marines in Vietnam (http://www.capmarine.com/cap/glossary.htm) and this Language of War page from the PBS web site for their Vietnam Online program.