In popular jargon of the US
Marine Corps:
a. a person who rarely exhibits effort and/or
responsibility and lets others do all the work; a loafer, slacker, dope-off, weasel; shirker, screw off, malingerer.
b. a person assigned to a comfortable job relative to others in his unit;
c. a short person or a person of slight stature or build;
d. a term sometime used to refer to civilian employees of the
Department of Defense or a government contractor.
Private Smith: Have
you seen Private Jones lately?
Corporal Hardass: Nope, he's
disappeared from work detail again today but when I catch up with our
resident feather merchant, I'm gonna knock him on his ass.