身み内うちびいき

noun

nepotism; favoritism toward relatives

Refers to showing unfair preference to one's own family or close in-group, especially in professional or organizational contexts.

• あの会かい社しゃは身み内うちびいきがひどい。

  That company is full of nepotism.

• 身み内うちびいきで採さい用ようを決きめるのはよくない。

  It's not good to decide hiring based on favoritism toward relatives.