Definitions

1. noun

A person who supports a particular view or opinion, often to the point of being overly biased or dismissive of opposing views.

“She was accused of being a mysidean when discussing the politics of the region.”

2. adjective

Characterized by or showing an overly strong support for one’s own views or opinions, often at the expense of considering opposing views.

“The mysidean approach to the debate led to a lack of productive discussion among the participants.”