Oh man.
I am actually such a connoisseur of awful movies that I don't know if I could pick the WORST movie I've ever seen. Here are a few candidates though:
Birdemic: Shock and Terror (2008)
Elf Bowling (2007)
(
@Diana @Isabella Hime @Gibs )
Paranormal Asylum: The Revenge of Typhoid Mary (2013)
Zombie Ass: Toilet of the Dead (2011)
[warning=red]
Warning: Even just this trailer is inappropriate and gross as fuck.[/warning]
Vampiyaz (2004)
I actually couldn't even find a trailer for this, so enjoy this sample of some of the worst scenes in the movie:
I can't remember the name of it and Google isn't helping me, but I also watched some awful indie gay teen romance movie that my then-girlfriend rented from Blockbuster c. 2005. It was boring as fuck.