Top Definition
Regression Towards The Mean
In statistics, regression toward the mean (RTTM for short) is the phenomenon that if a variable is extreme on its first measurement, it will tend to be closer to the average on its second measurement—and, paradoxically, if it is extreme on its second measurement, it will tend to have been closer to the average on its first.
by Awesomedude8888 December 18, 2014

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Rock to the max!
Korean artiste rttm!
by STUPIDLiar April 30, 2011

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Rad To The Max
yo, that Audi B6 S4 is RTTM!
by pacojorge February 18, 2011

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