(1):

(n.) Hasty or careless writing; a writing of little value; a scrawl; as, a hasty scribble.

(2):

(v. t.) To card coarsely; to run through the scribbling machine.

(3):

(v. i.) To write without care, elegance, or value; to scrawl.

(4):

(v. t.) To fill or cover with careless or worthless writing.

(5):

(v. t.) To write hastily or carelessly, without regard to correctness or elegance; as, to scribble a letter.