to write hastily or carelessly

to scribble a letter.

to cover with meaningless writing or marks

to scribble all over a page.

to write or draw in a hasty or careless way.

to make meaningless marks, scrolls, lines, etc., with a pencil, pen, or the like.

a note or other writing that has little or no meaning.

a hasty or careless drawing or piece of writing.

handwriting, esp. when illegible.

verb

doodle , jot , scratch , scrawl , squiggle , write badly , write erratically