HOUSE 2, HOUSEBOUND, FRIGHT NIGHT (original), TREMORS, JAWS, ARACHNOPHOBIA, EIGHT LEGGED FREAKS, DAWN OF THE DEAD (original), UNDEAD, CREEPSHOW 1 & 2, TALES FROM THE CRYPT movies, AMERICAN WEREWOLF IN LONDON, INNOCENT BLOOD...
While there's the usual horror comedies such as Shaun Of The Dead and Dale & Tucker Vs Evil the last horror film that made me laugh was The Incredible Melting Man.
There is some truly awful acting that make this film very funny.
HOUSE 2, HOUSEBOUND, FRIGHT NIGHT (original), TREMORS, JAWS, ARACHNOPHOBIA, EIGHT LEGGED FREAKS, DAWN OF THE DEAD (original), UNDEAD, CREEPSHOW 1 & 2, TALES FROM THE CRYPT movies, AMERICAN WEREWOLF IN LONDON, INNOCENT BLOOD...
I saw "The Visit" a few days ago, it's both hilarious and really creepy at the same time. I guess even a blind shyamalan finds a kernel of corn every once in a while.
Some have already been mentioned. There are my 10 most favorite: Shaun Of The Dead, Zombieland, Tucker And Dale Vs. Evil, Student Bodies, Killer Klowns From Outer Space, Critters, Scary Movie, Hatchet, Evil Dead, Dead Alive
Not all are laugh out loud funny, buist some are just so cheesy, it makes you laugh.