Think Big (1989)
The Paul Brothers also appeared in "The Barbarians", but this is, if possible, even more morbidly cretinous.
The people behind this flick were just bright enough to realise that these two mulleted oafs had to be played as idiots, but not bright enough to make anything witty out of the situation. However, the occasional line does raise a genuine chuckle.
Also starring David "breathing problems" Carradine, Jean-Claude van Damme...'s wife, Michael "funny voices" Winslow from Police Academy, Claudia Christian from Babylon 5, a German talk-show host, Richard Kiel from Eegah and OMG David Bowie! Oh, sorry, David Bowe. He was in PEN15 and one episode of The Larry Sanders Show, you know. Also Martin Mull and Richard Moll. Or was it Richard Mull and Martin Moll?