1. A silly, energetic, crazy, or eccentric person.
It's like saying: "You crazy!" except it's pillbox.
Steeling spoons, constructing elaborate set ups. You guys are such pillboxes.
1. A military-style haircut in which the sides are cut very short, while the top is slightly longer and flat. Top is often faded to the sides to make the 'do more uniform. This haircut is a variation of the "high and tight".
2. A box for holding pills. Duh!
Many soldiers in the U.S.M.C. have "pillbox" haircuts.