French people love nicknames. Not in our American way of shortening regular names; no, they will never reduce Robert to Bob, or Jacqueline-Inès to Jacki. But funny, descriptive nicknames they like, sometimes ones you don't say to the person concerned.
So a while ago I was chatting with our administrative assistant over coffee, who asked me to describe the position of my 2nd-year Master student, Alex. And, for some reason I have no memory of, I said he was a sort of embryonic doctoral student.
And now the whole lab knows him as L'embryon.
Which he kind of likes.
Glad I could contribute.