Missionary Dating: (Phrase) Used to describe when a person of one religious persuasion dates a person with differing beliefs for the purpose of converting him or her.

I didn't realize Kelly Osbourne's new boyfriend was Amish. Huh. I wonder why she's trying to hail a cab when they could just take his horse and buggy?

Okay, okay, I know he's not really Amish. I'm just saying, I'm from Pennsylvania and that's what they look like. Obviously, a real Amish person wouldn't come within fifty feet of Kelly Osbourne without crossing themselves repeatedly to ward off the evil eye. Or wear ball-hugger jeans. The Amish also possess a little something known as "modesty."