stick figure
A stick figure is a form of drawing human beings (or other creatures) in which major portions of the body are simplified into single line segments. A majority of XKCD is drawn in a stick-figure style.
A typical stick figure has one line each for the torso, each arm and each leg, and a circle for a head. More complexity can be added to stick figures by adding joints (two line segments for each arm or leg, or a neck) as well as adding line segments for feet, circles for hands, line segments for fingers, or facial features for expression.
In most stick figure drawings (including XKCD, typically), most other objects depicted are generally drawn in a similarly simplified style, just as simplified outlines or with line segments or basic shapes in place of more complex figures.
