"Short round" - artillery speak for a round with inadequate propellant that falls short
"Tune your iron to rock n'roll" - Viet Nam era slang for switch your M-16 to full auto
'Gun decking" for fudging a solution or an inelegant quick fix. In the old days, midshipmen in training worked out thier navigation problems on teh gun deck, sometimes 'collaboratively' or 'creatively'
"Son of a Gun" - alsoan old navy term from the times when the ships carried hookers stowed away for the crew's 'entertainment'. As one sould expect, some became pregnant and often gave bitth on the gun deck. Since paternity was unknown, the kid became a 'son of a gun'