Well, today I was have an interoffice mail conversation with a coworker who works on the same project as I, but in a different area. In my third response to him, I rocked an "Odonadon" instead of my standard signature at the end of the e-mail message. I only realized this once he replied and I went to re-read what he wrote in the message history.
Thankfully, he didn't notice my "unprofessionalism" - probably attributing the Odonadon to some random press of keys as I was hitting SEND

Not many people know what an Odonadon is.
Odonadon