noun.
someone who advocates defeatism, or has such an attitude
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
someone who is resigned to defeat without offering positive suggestions
Word Usage
"I for one do not mind my tax dollars going to a dog park and I commend those members of the City Council who refuse to engage in defeatist and negative thinking that always seems to hold this City back."