Top Definition
A mindset amongst residents of coastal Massachusetts (not confined to, but most often seen among Bostonians) that results in cramming people, objects, or explanations into insufficiently small confines, whether they be tangible or not.
Taking into account the game of baseball and space needed to play it, the design of Fenway Park cleary shows a chowderheadism on the part of the James McLaughlin Construction Company.

A typical chowderheadism amongst Bostonians is the explanation of David Ortiz's positive steroid test chalked up to a tainted Dominican protein shake.
by LRB/513/REGS October 20, 2009
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