Noun,
A
US Military term for a special kind of upper-torso wound (usually combat related) caused mostly by bullet-projectiles or sharpnel, which punctures/damages the lungs/chest cavity in such a way as to create an
amazing (but often fatal) condition whereas the victim is in essence breathing
air(inhaling & exhaling)through the hole in his chest. It's rare, but if you ever get a chance to see one, it's pretty darn cool.
Note: To treat this wound, one waits for the
poor sucker to exhale, then covers the wound with a piece of platic. As the victim inhales (sucks-in) hopefully the
air-sucking pulls the plastic tight into the wound and forms sort of a rudimentary
air-locking seal.