Native Okie here. All soda is pop or coke. As in: "Do you want a coke?" "Sure, I'll take a Dr. Pepper."
Fixin' to- I am about to do something. I'm fixin' to go to the store.
Turn signal is blinker.
Refrigerator is fridge or ice box (sometimes)
My grandma liked to say "yesterday of an evenin'" She also added an s to Walmart. "Yesterday of an evenin' I went to Walmarts and bought groceries." This means "last night." I tend to say it's hotter than blue blazes in here, though in my accent it comes out "hotter'n blue blazes."
Never put g on the end of words. You are readin', writin,' studyin', goin', shoppin', workin', etc. Days of the week rhyme with the word me: pronounced Sundee, Mondee, Tuesdee, Wednesdee, Thursdee, Fridee, Saturdee. I don't do this as much as my grandpa and dad. Also, I don't do this as much, but a lot of my family are bad about saying warsh instead of wash.