there is no fool like an old fool
there
ðeər
dher
is
ɪz
iz
no
nəʊ
new
fool
fu:l
fool
like
laɪk
laik
an
an
an
old
əʊld
ewld
fool
fu:l
fool
an old fool is the worst of fools
old fools are the worst of fools

Definition & Meaning of "there is no fool like an old fool"in English

there is no fool like an old fool
01

used to suggest that an older person who behaves foolishly is especially deserving of criticism for not having learned from their past experiences 

Proverb

What is the origin of the proverb "there is no fool like an old fool" and when to use it?

The origin of the proverb "there is no fool like an old fool" is rooted in English-speaking cultures, where it is believed that with age comes wisdom. The saying highlights the idea that with age comes the expectation of greater wisdom, so when an older person acts foolishly, it is seen as more surprising or disappointing. It serves as a reminder that wisdom is expected to grow with age, and people should be mindful of their actions as they grow older.

Examples
My grandfather keeps falling for online scams and giving away his personal information. There is no fool like an old fool. 
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