What does the phrase “I'm your huckleberry” mean?

Dear Aisha Ibrahim,

If someone says, “I’m your huckleberry”, then that someone is claiming to be able to do the task someone wanted to allocate. It means that whoever uses this phrase is the right person to do a job or the person someone is looking for to accomplish a chore. 

Just like when a teacher asks who can collect the homework of everyone in the class, one student may say, “I’m your huckleberry, Miss. I’ll get their homework and put them on your table later.”