two teamer 

a sports fan who roots for two or more teams

Guy 1: "How does Dan like the Jets and the Eagles?"

Guy 2: "Because, he is low down, dirty two teamer!"

two teamer by TheTokenGuy September 1, 2012

two-termer 

A US president who has been elected twice and has served for 8 years, the maximum amount of years a president can serve.

Ronald Reagan, Bill Clinton, and George W. Bush are common examples of two-termers.

two-termer by Dassh February 8, 2007