trading that fiddle in for a harp


Senior Member
Hello. there's a paragraph:

I'll try you for this job, Jackson. but remember, it's a big job and you're just a musician. you don't have any experience for this job. you may be trading that fiddle in for a harp.

note: Jackson is a fiddle player.
can you please help me to understand the bold line? I think somehow the meaning is that it's a big, out-of-your-skill, job. but I want to know if it's a proverb or something.

Thank you.
  • modulus

    Senior Member
    ইংরেজি - আমেরিক
    It is only after TT's explanation that I get the punch line. :)
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