Jimmy Kimmel and Matt Damon's feud was alive and well during the Oscars on Sunday night. During Jimmy's opening monologue, the late-night host couldn't help but poke fun at his frenemy. After making a few cheap digs about his appearance, he went all in as he critiqued his decision to star in The Great Wall over the Oscar-nominated Manchester by the Sea. "He handed that part to his friend and took a Chinese ponytail movie," he said, referencing best actor nominee Casey Affleck. "That movie went on to lose $80 million. Smooth move, dumbass." Ouch! We can't wait to see what other hilarious jokes Jimmy will come up with during the show.