Anything with Danny de Vito in it.... excepting Taxi.
There's some films where it's just plainly evident that it's going to be a pile of unmitigated crap. ("Snakes on a Plane" is one such, I have to say!) I remember seeing the poster for a DeVito and Arnold Swcharsathingy movie; some kind of 'long lost brothers' thing... you just knew that that was as funny as it got. Similarly, a pregnant Arnie or the 'kindergarten cop' one.
They are what I call 'motorcycle grannie' jokes. Setting up some obvious juxtaposition that we're all meant to howl with laughter at. Like those oh so comedic blokes (rugby players?) that think it a right laugh to dress up in drag... but will abuse any bloke with a 'man bag'... and beat the crap out of a cross dresser. Sorry
![Wink ;) ;)](/styles/default/xenforo/smls/wink.gif)
getting a bit OT
It's possible to make such juxtapositions funny, but you have to so something with them. They are not funny in and of themselves.