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The moment during a particular sporting event, particularly table tennis when the god of momentum makes a stark decision as to who he wants to win. If he chooses the opposing player this is defined as a momentum shift and is crucial in defining the outcome of the match.
Sam: 'you're so lucky, you didn't deserve that point at all'!
Will: 'thats a definite momentum shift-the god has sided with me'!
by Will Oakeshott June 13, 2011