Definition of "straw man"
straw man
noun
plural straw men
(figurative) An insubstantial concept, idea, endeavor or argument, particularly one deliberately set up to be weakly supported, e.g. by misrepresenting an opponent's argument by broadening or narrowing the scope of a premise, so that it can be easily knocked down; especially to impugn the strength of any related or contrasted thing or idea.