Couple of quick ones that I remember from boot camp.
Army - Ain't Really Marines Yet.
Marine - My Ass Rides On Navy Equipment / Muscles Are Required, Intelligence Not Essential.
Steal - Strategically Take Equipment to an Alternate Location.
PFC - Perfect For Cleaning.
USCG - Uncle Sam's Confused Group.
USMC - Uncle Sam's Misguided Children.
Yes, I'm a Marine and I eat crayons with Elmer's glue, what about it?