What was the most embarrasing time you incorrectly used a word or phrase?

I mixed up castigated with castrated once, and, asked whether I knew what “castrated” meant, said I did (because I thought I did – I thought it meant what castigated meant).

It was a typo. A friend of mine was rushing to the hospital before his baby was being born, and I texted “OMG I hope you get there before the baby dies!”

I meant to type “does”. I felt horrible.