Meaning of the word "the dog always returns to its vomit" in English

What does "the dog always returns to its vomit" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

the dog always returns to its vomit

US /ðə dɔɡ ˈɔːlweɪz rɪˈtɜːrnz tuː ɪts ˈvɑːmɪt/
UK /ðə dɒɡ ˈɔːlweɪz rɪˈtɜːnz tuː ɪts ˈvɒmɪt/
"the dog always returns to its vomit" picture

Idiom

a person who repeats their past mistakes or returns to bad habits despite knowing the consequences

Example:
He swore he would never gamble again, but the dog always returns to its vomit.
Watching him go back to that toxic job is like seeing the dog return to its vomit.