Top Definition
The killer late inning bullpen combination for the 2011 New York Yankees. It consists of Joba Chamberlain in the 7th, Rafael Soriano in the 8th and Mariano Rivera in the 9th. With each successive inning comes more of a challenge for any rival team. When their names are abbreviated (JOba, SOriano, MarianO) and combined they become a single deadly entity that makes the entire baseball nation quiver in fear.
"Just when the Red Sox thought that they might have a chance at getting to the Yankees starter, JoSoMo shut down any hope of victory for the team.
by NYYpride93 April 04, 2011
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