一条肠子

Traditional (Taiwan): 一條腸子

yītiáochángzi ㄧ ㄊㄧㄠˊ ㄔㄤˊ ˙ㄗ

    • single-minded
    • set on one aim and unwilling to change

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
one length of intestine
Meaning
Single-minded, set on one aim and unwilling to change. Can be mildly critical or admiring of straightforwardness.

Sources