WALK / TREAD A FINE / THIN LINE


Meaning of WALK / TREAD A FINE / THIN LINE in English

to be in a difficult or dangerous situation where you could easily make a mistake :

He was walking a fine line between being funny and being rude.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.