Meaning of the word "don't give up the day job!" in English

What does "don't give up the day job!" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

don't give up the day job!

US /doʊnt ɡɪv ʌp ðə deɪ dʒɑb!/
UK /dəʊnt ɡɪv ʌp ðə deɪ dʒɒb!/
"don't give up the day job!" picture

Idiom

used to tell someone that you do not think they are very good at something

Example:
Your singing is terrible, don't give up the day job!
He tried to fix the car, but it was clear he should not give up the day job.