exactly and from memory.

You know the telephone number by heart, don't you?

Usage notes: often used with know, learn, recite, and play:

I studied piano for two years, and all I learned to play by heart was "Twinkle Twinkle Little Star."

• give a damn about someone
• give a damn about something
• give a dirty look
• give a dose of own medicine
• give a dose of their own medicine
• give a fair crack of the whip
• give a fig
• give a foot in the door
• give a free hand
• give a free reign
• give a free rein
• give a hand
• give a hard time
• give a head start
• give a heads up
• give a hoot
• give a hostage to fortune
• give a leg up
• give a lick and a promise
• give all
• give [a lot of/some etc.] stick
• give a lot of stick
• give a miss
• give a monkey's
• give-and-take