Doodle (verb)

To make a simple, spontaneous drawing or design, often while thinking, talking or daydreaming.

Origin:

Of uncertain origin, possibly from the low german dudel, meaning to play music aimlessly.

Examples:

1. She doodled on the notepad while listening to the conference call.
2. I doodled during class, trying to stay awake.
3. He doodled on the menu while waiting for his food to arrive.
4. She doodled a picture of a house, imagining what it would be like to live there.
5. The artist doodled on a piece of paper, creating a rough sketch for his next painting.