(US) A member of the mathteam of a primary school or secondary school.
Blend of mathematics and athlete. The term is a registered trademark of the MathCounts organization. The term entered pop culture from the movie American Pie and also the 2004 movie Mean Girls, as well as being featured in the short-lived cult TV series Freaks and Geeks.
English Wiktionary. Available under CC-BY-SA license.