When the iPhone automatically changes your text words.
The iphone text messaging has an internal speller that phonetically changes words as you type them.
When texting GF I had I typed lard and but for reasons why I did not want to eat at Cracker Barrel with her and thanks to iPhoneticorrection, GF thinks I told her she has a large butt. If only Cracker Barrel had fruit I would not be in iPhoneticorrection Trouble.
I ducked my exGF yesterday at lunch and now she thinks that I *ucked my GF yesterday at lunch.