Not really a mishearing, but a misunderstanding for sure. When I was a younger child, I heard an older kid call someone a dildo. Like: “you dildo!!!” Being the highly intelligent young kid that I was, I surmised that dildo was another word for dodo.

My siblings and I promptly started using the word profusely. “Your a dildo!” No YOUR a dildo. Well you’re a dildohead!! Well you’re a big fat dildohead!! And so on. This was really one of our favorite insults.

This went on for some time. At some point (I’m not exactly sure how) I discivered the true meaning of the word. Imagine my surprise!! Needless to say, I informed the siblings and we quickly ceased using it.

To this day, I still don’t know why my parents never stopped us from using it. I know they heard it and said nothing.