When one calculates how many Chicken McNuggets one should order.
After applying McMath, Mary decided that she should order a 20 piece Chicken McNugget meal to last her all day.
by AntFreq May 26, 2010
1 more definition
noun; a person of prestige awesomeness.
man that guy was so cool, he was such a mcmath.
by riley mcmath April 29, 2008