A sports fan who picks his/her team to win, despite objective evidence to the contrary

the patriarch of The Simpsons funnier more for his more recent stupidity than his classic catch phrases.

1.) A knucklehead or idiot who's ignorant of the world around them. They lack self awareness and are oblivious to what they say and their own actions.

2.) A blind chauvinist that displays uncritical loyalty and enthusiasm towards a team, organization, leader, band, institution, etc in spite of their obvious faults and shortcomings. Usually belligerent to criticism no matter how constructive or benign it is to their entity they blindly and uncritically support.

3.) People who never learn from their mistakes or never learn period. See definition #1.

A sports official that is blatently calling games for the home team. Typically found in high school and ametuer sporting events.

Having blind judgement towards a player because he is on that person's favorite team. Usually results in poor arguments in discussions and getting raped in fantasy trades.

(N.) Homer - The big, fat, balding Kwijibo, apelike character from The Simpsons. Also known as the American Bonehead.
(V.) Homer, Pull a - To suceed despite idiocy.

Noun; American bonehead
To pull a Homer: To suceed despite idiocy.