Leg
LEG has nothing to do with the two lower limbs shared by most primates, including humans. In actuality, LEG stands for “low-entry ground soldier,” which refers to infantrymen who fight on land rather than via parachute. Another abbreviation in use is NAP, which stands for non-airborne people.
Fister
A fister is not someone who punches someone in the face. A soldier with the title is actually a member of a fire support unit. Their mission is to provide target information to artillery units, allowing them to hit their targets more precisely. Despite the name, boxing skills are not required for this critical fighting function.