In fact, we may have to make some adjustments to the old phrase “Crazy aunt at the family picnic”
In my case, I’m sticking with uncle as I always have.
My own personal psycho was “lovable”, loud, grinning, intelligent, funny, verbose and over-talked everybody to get his “punchlines” in.
He was also a serial pedophile.
“Creepy uncle” is hard-wired into my psyche.