guy 1: "I was about to give this homeless guy some money, but then I heard a rattlesnake and ran away."
guy 2: "You idiot, that was just a detroit rattlesnake."
Telltale sign that you are pissing off your wife, girlfriend, and/or significant other. With legs crossed, the leg on top starts bouncing at an increased pace the more agitated the subject becomes (usually a lady).
A hyperemic needle or syringe, with a high likelihood of having recently been used by an addict for taking heroin or some other type of illicit drug, laying outside on the sidewalk or roadway where someone may step on it.