Information that can be dangerous to know about. Some examples are how locking your knees too hard can cut off circulation and be lethal, or how grabbing your thumb and shaking your wrist can break an important part of your thumb. Yes, obviously there are much more dangerous things to know about, but that's up to you I guess.
Totally real person 1: Have you heard that grabbing your thumbs and shaking your wrists can break your thumb?
Totally real person 2: That's an infohazard
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.