咬死理

yǎosǐlǐ ㄧㄠˇ ㄙˇ ㄌㄧˇ

    • to cling stubbornly to one view, even an out-of-date or unreasonable one

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
bite a point to death
Meaning
To stubbornly cling to one view, even one that is out of date or unreasonable. Critical.

Sources