Someone who can find fault in anything and anyone, and focuses solely on the negative.

Like a fly that can find the nutrients in a pile of shit, a shit chewer can find the shit in even the most positive aspects of life.

Conversationalists 'chew the fat'.

Incorrgible pessimists 'chew the shit'.
'That's Fuckin' Harry for you. The asshole wins the lottery and all that shit chewer can do is bitch about the taxes he had to pay on it!'
by Mister Rat November 9, 2009
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