When I think of gross food from Maine...my gut screams LOBSTER.  CLAMS.  SEAFOOD in general.  Oddly enough, these aren't the answer...but I'm close to what the grossest food from Maine is...I'm shocked...and grossed out.

According to Topix Offbeat, the grossest food in Maine is:

Tomalley - which is the digestive gland of a lobster

I wouldn't eat this if I was dying of starvation.  Blech