to the core

US /tə ðə kɔr/
UK /tə ðə kɔr/
"to the core" picture
1.

hingga ke teras, sejati

completely; thoroughly; to the greatest extent

:
He was rotten to the core.
Dia busuk hingga ke teras.
She was a New Yorker to the core.
Dia seorang warga New York sejati.