Most Adventurous, Dude.
There comes a point in everyone's lives when someone holds out a piece of food that is new, interesting, vile, disgusting, weird, strange, gross, or otherwise off of our normal repertoire of ingested stuff. Not everything is for everyone, and not everyone will consider the same things adventurous. There was a point in time where I would never have even let a piece of raw fish cross my lips, but now Sushi is one of my favorite foods and pasttimes.
There is nothing more satisfying to me than to feel the tender, almost butter-like consistency of raw Ahi tuna. When it is fresh as can be and prepared properly, it will melt in your mouth. For some, that's gross. For others, it's normal.
So, onto the subject of the most adventurous thing I've ever eaten.
About seven years ago, I was Assistant Scoutmaster for a Boy Scout troop in Austin. There was another Assistant that was an outdoorsman and survivalist. He was doing research for a book about the psychology of eating things outside of the norm. For instance, he would regularly eat bugs and various things from the trees and ground on our campouts. He also bragged of eating dog meat and other animals. His point was that we have this thing in our mind that won't let us get past eating animals that we see as cute or domestic.
But that's not my most adventurous food.
This Scoutmaster was also a maker of his own jerky. He did beef, venison, turkey, and any other animal he could get his hands on.
One day he brought two bags of jerky to a meeting and I tried some. I'll give you a hint of what animal it was.
The ancient Egyptians revered and worshipped this animal. Pepe Le Pew. Meow Mix. Garfield. Morris. HEEEEEERRRREEEE KITTY KITTY KITTY!
That's right. Cat jerky.
I ate it and it wasn't bad. Kind of stringy, but not tough. He had put a nice marinade of Cholula hot sauce to give the feline a good flavor. Otherwise, I fear it would have been gamey.