If you scrawl something, you write it in a messy or careless way.
Scrawled things might look messy or hard to read.
Examples:
She scrawled her name on the paper.
The message was scrawled on the wall.
He scrawled a note to his friend.
The cat scrawled a message in the sand.
The monster scrawled a warning on the door.
I scrawled my name on the wall with a crayon.