It's hard to keep a straight face when you're being called a "lumpy faced basterd"

By Kiran Hefa
Updated February 07, 2014 12:30 PM
Credit: ABC

What do George Clooney, Matt Damon and Jon Hamm all have in common? No, not their status as PEOPLE’s Sexiest Man Alive honorees – it’s that Twitter is not their friend.

In his latest installment of Celebrities Read Mean Tweets, Jimmy Kimmel gathered Joseph Gordon-Levitt, Jennifer Garner, Tom Hanks and other Monuments Men cast members to read messages from their less-than-positive Twitter followings. Insults include calling Clooney a “lumpy faced basterd” and referring to Rob Lowe as “skin cancer.” Each star was dealt a blow to their psyche, none more so than Damon, who read a disparaging Tweet from frenemy Kimmel himself.

To see how the Bourne star handled being called a potential Oscar winner for “blowing ass,” check out the video below.