Besides the loud racial slurs they say loudly in public.
Are there any words old people say that leave you confused because people really don't call them these words today? Like how my grandpa insist on calling my book bag a satchel. He also calls tells me to "do my lessons" when he is referring to homework.
It can also be a phrase. My great aunt tell you to "lick your calf" you may think that she wants me to taste a baby cow, but it really means to go back and redo a job you fucked up.
Got any more?