When traveling in south Georgia on business, I made the mistake of calling the nuts peeecan. I was corrected by a sweet elderly southern woman (I knew I was in for it when she started with "Why bless your heart...").
"Honey. A peee can is what you put by your bed at night. A peecon is what you eat"
It’s generally not advisable to debate southernisms with older southern ladies, as I have known some that see stubbornness as an art form.