Dude, Where's My Car? (2000)

Jesse (Ashton Kutcher) and Chester (Seann William Scott), two potheads, wake up without memory of the previous night. They must find their car, which they believe contains gifts for their girlfriends. Along the way, they encounter furious Chinese restaurant workers, arrogant jocks, strippers, and a transgender woman with stolen money. The journey leads them to space nerds who seek a powerful device, a fake Continuum Transfunctioner, and a battle with a giant alien chick. Through it all, Jesse and Chester learn about love, friendship, and the importance of Chinese food.