The Collaborative International Dictionary of English v.0.48:
doodle \doo"dle\, n. [Cf. Dawdle.] A trifler; a simple fellow. [1913 Webster]WordNet (r) 3.0 (2006):
doodle n 1: an aimless drawing [syn: scribble, scrabble, doodle] v 1: make a doodle; draw aimlessly