A zebra in this case, is an NFL referee or referees who have thrown yellow flags excessively during a football game. So, a zebra jailbreak involves questionable calls occurring frequently during a game, slowing the game itself to a crawl, and the phrase is used by a fan to describe his fury with the referees.
I can't believe it! That's the third holding call in a row! It's a zebra jailbreak!
by UCSteve February 12, 2016
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