A piece of work
A one-of-a-kind person who's so weird and wild that they're unforgettable. They're the kind of person who makes your life interesting, even if they're a pain in the butt.
My crazy uncle is a piece of work. He turned my bedroom into a jungle and lived in a tree.
My weird friend is a piece of work. She eats soup for breakfast and talks to ghosts.
My teacher is a piece of work. He dressed up as a dinosaur and taught math on a trampoline.