When someone texts you something they wish they hadn't, so they claim it was because of autocorrect - even if the word they say they meant to use is actually a word.
Sarah: Jeff's cock is so big!
Robby: We should break up now.
Sarah: Sorry! Autocorrect! I meant clock! His clock is so big!
Robby: Why would autocorrect correct a real word? I call autocorrect defect!