know/learn (something) (off) by heart

if you know or learn something, especially a piece of writing, by heart, you know or learn it so that you can remember it perfectly.

He's my favourite poet. I know several of his poems by heart.

• go along with something
• go amiss
• go ape
• go around
• go around and around
• go around in circles
• go astray
• go at it hammer and tongs
• go back a long way
• go back to the drawing board
• go ballistic
• go bananas
• go beet red
• go beetroot
• go beetroot red
• go begging
• go belly up
• go beyond a joke
• go beyond the pale
• go blank
• go by the board
• go by the book
• go cap in hand
• go cold turkey
• God bless you