jot down
US /dʒɑːt daʊn/
UK /dʒɑːt daʊn/

1.
to write something quickly on a piece of paper so that you remember it
:
•
I'll just jot down his address before I forget it.
•
Can you jot down the main points of the meeting?
to write something quickly on a piece of paper so that you remember it