I love BAD movies. Really bad ones. One of the worst is The Terror with Jack Nicholson and Boris Karloff. Another is The Brain That Wouldn't Die. A really funny one is Lust In The Dust.

Tin Drum
Fried Green Tomatoes at the Whistlestop Cafe
Anything by John Waters
 
slawie

I wouldn't say my 3 were bad, just weird.  
 
OO

the seven faces of dr. lao.
classic.

Robot Monster
Eating Raoul

the scene with dennis hopper yelling mommy is a classic-

OK, I've scene (pun intended) all 3 of those.  
 
Dr Lao, Robot Monster and Eating Raoul. Yep all out in left field.

The drummer from my band in high school, David Atkins made a pretty weird one: Arizona Dream. He also made Novocaine with Steve Martin, which is also good, but not as weird.
 
Edwin

Haven't seen either one of thsoe Edwin, but I am going to the dentist tomorrow. Maybe he'll have it.  
 
OO

Flax, imagine seeing this after you watch BUG,  
What The...
 
OO

i saw bug... didn't think it was that weird, but being a complete horror movie nerd, that's not surprising. you want weird, watch black sheep (not the chris farley one), about zombie sheep in new zealand... that one's way out. and awesome.

REALLY! Wow, I'm almost afraid to watch that one then. LOL
 
OO

Buckaroo Banzai

Natural Born Killers: a 1994 satirical crime film directed by Oliver Stone about two mass murderers and the media coverage given to them. It is based on a screenplay by Quentin Tarantino that was heavily revised by Stone with writer Dave Veloz and associate producer Richard Rutowski.
 
Wild at Heart: a road movie and includes bizarre, almost supernatural events and off-kilter violence with sometimes overtly heavy allusions to The Wizard of Oz and strong references to Elvis Presley and his movies that found their way into screenplay as Lynch was writing it.
 
Mad Max: a 1979 Australian post-apocalyptic action thriller film directed by George Miller and written by Miller and Byron Kennedy. I was working as a projectionist when this film was released.  I had such a hard time following the thread of the story that I was convinced that I had assembled the movie out of order (movies were usually delivered to me as six small reels which I would splice together on 2 larger reels).

Slawie mentioned John Waters.  That just about sums it up!
 
Pink Flamingos
Female Trouble
Mondo Trasho