anyone who affiliates with a much lower class or is mediocre and unaccomplished but lies to seem on the up and up to pick up someone who is clearly out of their league.
She knew he was just a slum dumb when he claimed to have multiple houses and cars but could never prove it.

See also slum dumb millionaire
by TerriC May 5, 2011
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a slum dumb who tries to live the life of someone wealthy and cannot pay for it, but insists they can
He paid for everything last night, but when I called his cell today it was shut off so I know he is just a slum dumb millionaire.
by TerriC May 5, 2011
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