CAN'T MAKE HEAD NOR TAIL OF STH
Meaning of CAN'T MAKE HEAD NOR TAIL OF STH in English
to be unable to understand sth :
I couldn't make head nor tail of what he was saying.
Oxford Advanced Learner's English Dictionary.
Оксфордский английский словарь для изучающик язык на продвинутом уровне.
2005