Exaggerated: Billy Bob is pretty much a cowboy in military service, solving all his problems with More Dakka and flagrantly disobeying orders with and without reason. The Marines still keep him on, because he's Just That Good.
Downplayed: Billy Bob is a USMC corporal with a stereotypical Southern accent and an affinity for shotguns, but just as strict about orders as the rest of the squad.
Justified: Billy Bob joined the military just recently, and hasn't yet grown into respecting the protocol and his superiors.
Subverted: One of the Marines mentions another one named "Billy Bob", and the new guy immediately assumes he's a stereotypical shotgun-toting Southerner. When he meets Billy Bob in person, he turns out to be a Corporal Tough with great respect for the chain of command and military tradition...
Double Subverted: ...unless he gets his hands on a Grenade Launcher or a minigun - and when he does, he actually screams "Yee-haw!" as he lays waste to the enemies.
Parodied: The Southern Fried Private of the work is none other than Alice Stevenson, who is nontheless the best in the company thanks to her harsh Southern upbringing.
Zig Zagged: ???
Averted: Billy Bob is no different to all the other Marines, despite his Southern origin.
Defied: Billy Bob got into the USMC precisely to get away from the chaotic Southern life, so he's more serious about following orders than most other Marines.
Discussed: "What about the new guy?" "You mean Billy Bob?" "Yeah, him." "Well... he's from Arkansas. I don't think it's going to be too conductive to proper procedure."
Conversed: "Ever notice how there's always a redneck on the squad in these military shows?"
Billy Bob gets a lot of hazing and trashtalk for supposedly being a stereotypical Southern redneck. In reality, he's not, and would be a regular serviceman if his squaddies didn't keep throwing blanket parties for him.
Billy Bob's cowboy behavior gets him busted and court-martialed.