when a band or artist gets really popular, and everyone in the scene starts to hate them.

When you cum so hard you go flying backwards

when you are about to nut and a girl is riding you, then all of a sudden she gets up and your penis flings back at you at the exact moment you blow your load, resulting in a backlash of nut on you.

A well known "anti-stathead" poster on Baseball Primer.

One with excessive flatulence.

When things go smoothly for a period of time and you're enjoying life, karma finds its way back to you and fucks things up.

The act of your trachea causing severe coughing to the point where it becomes sentient and attempts or even succeeds in taking over the brain