HAVE / KNOW STH OFF PAT


Meaning of HAVE / KNOW STH OFF PAT in English

( BrE ) ( NAmE have / know sth down ˈpat )

to know sth perfectly so that you can repeat it at any time without having to think about it :

He had all the answers off pat.

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