doodle
verb
[ ˈduːd(ə)l ]
• scribble absent-mindedly.
• "he was only doodling in the margin"
doodle
noun
• a rough drawing made absent-mindedly.
• "the text was interspersed with doodles"
Origin:
early 17th century (originally as a noun denoting a fool, later as a verb in the sense ‘make a fool of, cheat’): from Low German dudeltopf, dudeldopp ‘simpleton’. Current senses date from the 1930s.