noun
one's true worth; one's true self; what one is really made of
Refers to a person's genuine ability, character, or essence, often revealed under pressure or in a critical moment.
ここで真骨頂を発揮しなければならない。
This is where I must show my true worth.
彼の真骨頂は、困難な状況
His true self emerges precisely in difficult situations.