Most bad-ass/memorable line in a horror movie

[gabriel1980]

"Groovy" - Evil Dead 2

[The DragonKeeper]

Sergeant Albrecht tells The Crow Eric Draven "you move your dead".

I always liked his reponse, "and I say I'm dead.. and I move." Cracks me up!

[jeo4]

The Lost Boys

You're a creature of the night Michael...just like out of a comic book! You're a vampire, Michael! My own brother...a goddamn, shit-sucking vampire. Well, you wait 'til mom finds out, buddy!

Initiation's over, Michael. Time to join the club.

Holy shit! It's the attack of Eddie Munster!

[jaw2929]

Another favourite:

[SL Dubbs]

Originally Posted by MovieMaster

Your mother sucks cocks in Hell, Karras, you faithless slime. - The Exorcist

Even by today's standards 39 years later I think that is probably one of the most if not the most offensive thing ever said in a film.

That would get my vote.