I'm your huckleberry. ~Val Kilmer, Tombstone
Adam Rifkin stashed this in Words!
Thank you BigMurph26 for making this gif.
I'm Your Huckleberry -- what does it mean ?
The etymology of the phrase is traced back to Aurthurian Lore. Huckleberry Garlands were said to be given to Knights of the Kingdom for coming to the service of a damsel. They would approach the lady, lower their lance, and receive the small branch as a symbol of gratitude; much like a medal.
Therefore, "I'm Your Huckleberry" literally means "I'm your Hero."
In current adaptaions, in reference to the movie Tombstone, it means "I'm your man." as an affirmative response to a challenge.