scratchpad
/ˈskrætʃpæd/Definitions
1. noun
a book or pad of paper used for jotting down notes or ideas, often used informally.
“She kept a scratchpad next to her desk to brainstorm new project ideas.”
2. verb
to write or draw on a scratchpad, typically in a hasty or informal manner.
“I was scratching out some ideas for a short story on a piece of scrap paper.”