>>Here's the deal: You say "might could" when someone asks you to do something that you really don't want to do. It's redundant and irresolute. You're not committing to anything. You're just throwing out the possibility that if the urge struck you, you could do it, but you probably won't.

Southerners are reluctant to say "No" to people for fear that we may hurt someone's feelings. So instead we really piss them off by being vague and non-committal.