I get hella stoned and watch Foodfight! at least once a year. It’s my “favorite” movie.
Everything about it, from the implied beastiality between Charlie Sheen and Hillary Duff, to the weird gay bat, to the shitweasel 
is a masterclass in what not to do in a movie. It transcends badness and becomes something sublime. The entire plot is about how store brands/generics are Nazis, and one of the Nazis absolutely chews the scenery in a way that makes Brian Blessed look reserved.
No ones said “The Room” yet, so I’ll go with that. Saw it once with Tommy and Greg in the audience, and another with just Greg (and a bunch more without either). But the ones with the cast there, you couldn’t take a step in the theater without stepping on a plastic spoon.
Either that or anything by Neil Breen.
Don’t confuse this with the movie simply titled Room.