What is I'm Your Huckleberry?
1.
19th century slang which was popularized more recently by the movie Tombstone. Means "I'm the man you're looking for". Nowdays it's usually used as a response to a threat or challenge, as in the movie.
"Who thinks they can beat me?"
"I'm your huckleberry."
See
2.
I'm your huckleberry comes from a very classic and hot western movie called tombstone. this phrase means I'm the perfect man for the job.
Jimmy: Who here wants to fight?
Holliday: I'm your huckleberry
Jimmy: Well come on then pus.
Holliday: Pulls out 12 gauge shottie
-Boooooom- Jimmy dies