In season 1 episode 13 of simpson a news anchor says
There is an overturned melon truck on the interstate. Oh it's a mess. There is lots of rubber neck in gandmelon wrestling going on, so expect delays--
What does the bold part mean?
As others have stated above, it seems you have misinterpreted the reporter.
The phrase is "rubbernecking and melon-wrestling."
Rubbernecking means to stare at something foolishly. It's often used to describe people in traffic as they drive past an accident on the highway. When you rubberneck, you usually slow down and cause the traffic to worsen.
Melon wrestling refers to people struggling to remove the melons from the road.