Twitter fight! Sam Ronson defends Lindsay Lohan against ... Joan Rivers?

joan-rivers-sam-ronson.jpg Lindsay Lohan's ex, Samantha Ronson, is tired of Joan Rivers bashing her former girlfriend.

"Lindsay Lohan is so dumb. Her idea of being sworn in is cursing at the judge," Rivers tweeted about LiLo's infamous manicure, adding, ."Lindsay Lohan had 'F*** you' painted on her nails. What people don't know is that the judge had 'Eat me you party skank,' painted on hers."