What did I ever say about your Mom?
LOL, I’m sorry, Elderberry.
1) It’s a Monty Python joke.
2) The humor is in the obtuseness: There’s nothing wrong with smelling like elderberry.
3) Presumably she’s related to you.
Of course, I botched the quote. The line is that your FATHER smelled of elderberries.
(In-story, the insult probably meant to assert that the father was a drunk, but being said by a Frenchman, the point was that the reference was so obscure as to not really be insulting at all. Indeed, the silly person was the Frenchman who said it, not the Englishman who was being insulted; I was being silly, not insulting.)