Meaning of the word "there is no fool like an old fool" in English

What does "there is no fool like an old fool" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

there is no fool like an old fool

US /ðɛr ɪz noʊ ful laɪk æn oʊld ful/
UK /ðɛər ɪz nəʊ fuːl laɪk ən əʊld fuːl/
"there is no fool like an old fool" picture

Idiom

used to say that when an older person acts foolishly, it is much worse than when a young person does, because they should have more wisdom and experience

Example:
He spent his entire life savings on a scam; truly, there is no fool like an old fool.
My grandfather is getting married to a twenty-year-old; I guess there is no fool like an old fool.