When a person is told, or hears a joke, then proceeds to explain why the joke isn't realistic, or real thus ruining it for all involved. A response to say to one who participates in haucking is "don't hauck
Pat: That chic was like 8 feet tall, dude, it was hilarious!
Haucker: Um, well the tallest person ever wasn't even that tall, so I'm pretty sure that's impossible.
Pat: Fuck you, you hacuked it.