Scrawl, v. t. [imp. & p. p. Scrawled p. pr. & vb. n. Scrawling.] To draw or mark awkwardly and irregularly; to write hastily and carelessly; to scratch; to scribble; as, to scrawl a letter.
His name, scrawled by himself. --Macaulay.
scrawled
adj : written hastily or carelessly; "his scrawled signature"