By far, imho, the Awesomely Worst Movie is Battlefield Earth starring it's 'creator' John Travolta:
and a close 2nd, you guessed it, another Travolta doozie, Swordfish.
My apologies to Don Cheadle, who was somehow roped into this one...
If Battlefield Earth weren't so technically inane, it would have been OK. The Harrier jets that have been stored without maintenance for 10000 years that fly without any mechanical work was about as laughable as anything gets in the movies.