Like, a horror movie that instead of scare you makes you laugh more than a comedy
Deadpool famously advertised itself as a Valentine’s day romcom.
A lot of people think Star Wars is science - fiction. But it is fantasy.
Donny Darko, maybe? All I knew was that it was a psycho thriller. I had to go on the internet to find out WTF I had just seen, because it’s also a sci-fi.
The Princess Bride. The title does not at all suggest that this is a comedy movie.
I’m trying to understand this question a bit more. Do you mean intentionally not typical for it’s genre, or unintentionally?
If intentionally, I’d go with Shaun of the Dead, though it’s actually considered part of the ‘comedy horror’ genre so wouldn’t necessarily consider it ‘lying’ about being hilarious film about a zombie apocalypse.
If unintentionally, then hands down Troll 2. You can’t piss on hospitality.