The Babadook is a uniquely Austrailian version of the boogeyman conjured from a bad book to terrorize those afflicted by grief and depression.
In the film adaption, he's likely the restless spirit of the dead husband/father who ultimately can't be vanquished but can be managed and ends up living in their basement.
Subsequently, he's become a significant meme and LGBTQ+ and drag icon.
Check out "Babashook" and you'll see why the Babadook is a fucking legend. So woke, the film got a special edition Pride release a few years back
https://ew.com/movies/2019/06/03/the...pride-blu-ray/
First Editions of the Mister Babadook pop-up book sell for a several hundred dollars