It's a subtle way of saying that you can't do something in a relationship. Like when you don't have time for a romantic dinner, but only two minutes for sex.
1:
Woman: We're supposed to taste wedding cakes this afternoon, remember?
Man: Ouch! No-can-do's-ville, baby doll.
2:
Woman: Wow, that was really mean. I think you owe me an apology.
Man: No-can-do's-ville, baby doll, no-can-do's-ville.
Term used to describe someone who is a mix of both rural (country) and urban (metropolitan) lifestyles/upbringings. He/she is typically equally comfortable in both settings and is able to seamlessly slip back and forth between the two, appreciating the characteristics of each.
That ol' gal of mine drives the 12lane freeway during the week and a John Deere on the weekends. She likes opra and the Grand Ol' Opry. I love them countrypolitan women.