Fixin’ To
When someone tells you that they are “fixin’ to” something, they do not mean that they will be fetching the toolbox to do some repairs, but rather that they will be doing something. For example, if someone had to say “I’m fixin’ to finally get my Ph.D.”, they mean that they wish to study further. This is quite a simple one, but the tense can vary between future and present, and Southerners often fail to establish when they will actually do something.
Too Big For Your Britches
Southerners enjoy fashion and the wearing of clothes just as much as any other group, but they might have some old-fashioned terms for certain items. For example, the word “britches” is used to describe undergarments and pants. So, when a person says that you are “too big for your britches”, they do not mean that you are too fat for your current outfit, but rather that you are being pretentious or overconfident. Southern kids will hear this often from their parents when they are misbehaving or doing something that is deemed too advanced for kids.