A kick or punch to the genitals.
More specifically, this is the alternative to a dare in the game Truth or Dare. If one takes the dare and decides after having heard the dare that they don't want to do it, that person must then accept the Jare.
Also referred to as "Dick Kick" or "Poon Punch."
Billy: I dare you to lick the rim of the toilet bowl.
Timmy: Hell no! I'm not doing that, it's disgusting!
Billy: THEN PREPARE TO BE JARE'D!
A guy who runs in every presidential election and never wins.
If you don't like either of the big candidates, vote for Nader.
Guy 1: I hate the Democratic candidate.
Guy 2: The Republican candidate sucks too. Let's vote Nader.
The best downgrade Mozilla's ever gone through. Though on the surface it might look good, when you get into it it's way worse than firefox 2.
Person 1: Dude, I got Firefox 3. It sucks!
Person 2: That's why I didn't download it.