"A leopard doesn't change its spots"
has the meaning of "a person cannot, or does not, change his or
her character, especially if it is an evil one".
This idiom is said to be
originated from the Bible (Jeremiah 13:23) which states
"Can an Ethiopian
change his skin or a leopard its spots?
Neither can you do good who
are accustomed to doing evil."
Check out more Idioms
/ Proverbs here.
Ungkapan Bahasa Inggeris
"A leopard doesn't change its
ini bermaksud seseorang tidak boleh mengubah perangai atau sikapnya,
terutamanya perangai yang buruk.
/ Peribahasa Inggeris lain.