Shotgun Wedding: (Noun) An enforced or hurried wedding, esp. because the bride is pregnant.

Hoo boy! It looks like the Spears clan is fixin for a good old, down-home, Southern shotgun wedding -- as 16-year-old mother to be, Jamie Lynn Spears has reportedly been showing off a brand new engagement ring.

My advice for Casey Aldridge, the presumably thrilled young groom? Don't even think about running. Seriously, dude. I'm guessing these Spears people take their shotgun weddings very seriously. And if Britney's holding the shotgun? Well, she might even take out one of your knees just for the sport of it.