stick figure

Short definition from Wiktionary

Noun

1. 1
   A simple drawing, usually representing a human: A line drawing with a circle for the head and straight lines for the torso and limbs.
2. 2
   A simple drawing, usually representing a human: An outline, with a more realistic body shape, commonly used on warning signs, bathroom doors, and in other such symbols.
3. 3
   A skinny person.