All these responses are silly assumptions!
In the moveie he didn't say "I'm your huckleberry", he said "I'm your HUCKLEBEARER". His accent in the movie makes it hard to hear. In the 1800's little handles on a coffin were called "huckles", an English term. Instead of pallbearers the people who carried the coffin were called "hucklebearers" at the funeral.
This is why the other guy got so bent outta shape when Doc said "I'm your hucklebearer". He was telling the other guy "I'm your pallbearer" or literally I'm causing your funeral. This is why it was so offensive and the shooting started.
Ringo: Wretched slugs, don't any of you have the guts to play for blood?
Doc: I'm your huckleberry.
by JonesAnthony February 4, 2012
Get the I'm your huckleberry mug.
A way of expressing one's commitment to lend a hand.
I'm your huckleberry in closing this deal.
by Pottsicle December 11, 2015
Get the I'm your huckleberry mug.
You play 'Tom Sawyer' and I will be your 'daddy' in this game as Tom 'kinda' looked up to Huck (in my humble opinion). Ala Mark Twain.

And I will jump into your game Like 'Huck Finn', and give you a "shel·lack·ing" (As the most Hon. Sir Sean Connery could only say properly). And we will "tear-this moTHa-out". +))
Your boss comes by and asks you to justify your 'ExisTenz' by telling him how you deserve to get a paycheck this week.
And you reply: "...I'm your huckleberry..."
by Muzlim0happy=)) August 27, 2009
Get the I'm your huckleberry mug.
A Huckleberry is an idea, problem, want, need, or solution.
What's Your Huckleberry?

Ex:Paper receipts suck. How about digital receipts?
by Mr. Huckleberry January 16, 2010
Get the What's Your Huckleberry? mug.
A thrust using an elongated arm with a huckleberry in hand. This is a secret lethal move that was created by the huckleberry masters
Jeez louise, that guy knows the huckleberry thrust. He is dangerous and a great fighter
by Bobithias July 4, 2023
Get the huckleberry thrust mug.
A thrust using an elongated arm with a huckleberry in hand. This a secret technique created by the huckleberry masters.
Woah that guy is so skilled, he knows the huckleberry thrust
by Bobithias July 4, 2023
Get the huckleberry thrust mug.