There's a dairy farm near where I'm doing my art show, and they make this flavor only during the summer:
They call it "Trash" and it's all the stuff left over from all their other ice cream flavors, colored neon purple. I love this stuff. Last night, mine had several whole raspberry truffles and mini peanut butter cups in it, part of a peppermint patty, and what I think was a coffee been.
It sort of tastes and smells like play-doh.