know backwards

Meaning

1. know sb / sth backwards

   to know sb / sth extremely well

   She must know the play backwards by now.

In the movies · 1

• -Harvey, I know these briefs backwards. -Well, then...The Dark Knight2008

From the same entry

• before you know where you are
• be not to know
• for all you, I, they, know
• God knows
• I don't know how, why, etc.
• I know
• know as well as I do
• know best
• know better
• know by sight
• know different
• know full well